Since I'll be GMing the next sequence, this is a semi-official commentary.

I haven't sat down and checked the math.
Walking Dad wrote:Shapeshifter: Shapeshift 1 (5pp) • 8 points
Just as a general thing with Variable, what do you see as the extent of what he can do with this?
Walking Dad wrote:Natural Telepath: Super-Senses 2 (Mental Awareness, Radius) • 2 points
That will make you able to detect the use of Mental powers, not to detect minds. Is that your intent?
Walking Dad wrote:• Density: Enhanced Strength 20, Impervious Toughness 13, Sustained • 1 point
It probably goes without saying, but gradations of the form will have to buy proportional amounts of each when scaling. I'm also a bit uneasy at allowing Impervious that far over power level. Would you be willing to cap it at 10 ranks of Impervious? That would also make it nicely proportional to the strength increase.
Walking Dad wrote:• Ghostform: Insubstantial 4 (Selective, Subtle 1), Concealment (Visual) 4 • 2 points
Just noting that since neither of these powers have a "fewer ranks" setup, you'll be using 30 pp of your array any time you have this active.
Walking Dad wrote:• Mind Scan: Super-Senses: Detect (Minds) ranged (2) [Radius (1), Accurate (2), Acute (1), Analytical (1), Extended 4, Rapid 4]) • 2 points
As with Ghostform, just noting that this power, too, doesn't really break up, so it's 15 pp any time you use it.
Walking Dad wrote:• Mental Broadcast: Communication 4 (Mental, Worldwide, Extra: Area, selective, Subtle, Feature: Two-Way) • 2 points
Communication 4 is "1 mile" in 2E, but given it only costs you 3 x rank + 2 pp (Selective is a feat, not an Extra and
Two-way is an Extra, not a Feat), you have the capability to push it up to Communication 11 if you put all of your points into it. Communication 9 is the breakpoint for covering the Earth. As a side note, technically speaking, you can't turn Extras on and off and Selective requires specifying who you don't want to use the power on, so area broadcasts may be a bit hard to screen from others unless you have specific cases in mind. That said, talking is a free action, so you're probably in decent shape in most cases.
Walking Dad wrote:Feats: All-Out Attack, Attack Specialization (Unarmed) 4, Improved Initiative 2, Luck 2, Power Attack, Uncanny Dodge (mental)
In case I forget to mention it below, your attack specialization takes you over caps when using your Density form, taking your unarmed bonus to +12 with +12 damage. I'm guessing that the AoA/PA is meant to take advantage of greater strength/toughness in your Density form, but it seems a bit odd that a peaceful scientist would be sporting feats usually paired up with berserker warriors. Lastly, unless you have your Detect (Minds) power up, you have no mental sense to detect anything not related to mental powers, so your Uncanny Dodge may not come into play quite as often.
Walking Dad wrote:Skills: Bluff 6 (+6), Craft: Electronic 2 (+3), Disguise 6 (+6), Drive 1 (+1), Investigate 4 (+5), Language 3 (English, Hindi, Lor), Notice 5 (+8), Pilot 1 (+1), Search 4 (+5), Sense Motive 2 (+5), Stealth 2 (+2)
Again, commenting on the engineer/scientist background, he doesn't seem to sport many skills related to who he is. He's also, in general, a bit light on his skills. As a side note, you could probably address this by indicating that the process did something to him mentally, either obscuring his memories or simply making him more bestial.
Walking Dad wrote:Combat:
Initiative +0
Attack Bonus: +4
Force Vision -, Perception, Damage 10
Unarmed +8, Close, Damage 2/12
Defense +7, Toughness +13
Fortitude +9, Reflex +7, Will +11
Your saves are a bit on the high side compared to the others, but probably not too far off. As noted above, unarmed adds to your melee range attack bonus, so your Attack Specialization puts you over caps when using your Density. Changing Attack Specialization to Attack Focus (Melee) would be an easy fix which also lets him use close-range weaponry at full bonus. You could also reduce your number of ranks in Attack Specialization down to 2.
Walking Dad wrote:Complications:
Identity: Visitor maintains a human identity as Ajay Sidhu, an Ind-American scientist, and wants to protect both his own secret and the fact that the real Ajay Sidhu perished some time ago.
Motivation—Responsibility: Visitor strongly believes it is his responsibility to user his powers to help others.
Prejudice: Visitor’s alien appearance and origins sometimes provoke mistrust and hostility.
^_^ Given you don't have Morph to indicate that he can look like Ajay, which means you've got this insectoid creature going around in a labcoat with a nametag of "Ajay" and hoping no one notices the difference...