This is quite good but as you say, Cas, it's uneven at times and suffers without its star.
There's a few nice lines like, Hamster, don't engage the troll! amongst the not so good, which can linger like a bad smell - as can some scenes. But it's clearly Manganiello that's the obvious draw here and he manages well with what he has to work with. He's a kind of Punisher come any mix of fallen superhero; that has taken to drink to not so much forget but sedate the ever present feeling of failure. You can't help but not see the lingering Icaria Mill Supply sign in one rooftop shot and I took that as reference to Icarus (and/or the people of Icaria), with Joe portraying the literal fallen man from the skies but one who is still intent on betterment of the people. And again, it's the mash up of the people being tired of their unwanted saviour, who just won't lie down his cape.
The two young actors are unfortunately at odds too but in acting ability. One scene can have them delivering a line well enough and looking comfortable, whilst another makes it all look like community college. At times, I wondered if the director was going to whisper a line to save them, move things on or, shout Cut...Let's go again. I had this sense too, when the more experienced actors were with them and appeared to be willing them on in some direction.
The toon element works well enough for this; it's not exactly to the levels of the excellent Tron series, but given it's overall budget, anything more would've no doubt been well out of place.
A tighter rein on the younger actors, trimming of scenes and a story with more black humour and less obvious pitfalls could've seen this fair much better. Not much to ask.
I have to mention Paul Scheer's literal 'genius' tattooed bit part though, in that it's an oddity in and of itself but worked so well. If only AEM could've penned more scenes like that and had actors that actually knew how to, well, act, this wouldn't of fell like a certain reaching and naïve son quite so much.