Just so you know, LogiTeeka, I've been watching the episodes as soon as I'm able to every Sunday, I just haven't been too enthused to post about it for whatever reason.
I've liked most of the series so far and my original impression stands: it aspires to do very little other than make you laugh and for the most part it pulls it off, and it's actually quite clever in some ways. The sense of timing is generally good and the dialogue is slick and well-delivered, showing that the VAs have a good grasp on the characters they're voicing. I loved the escalation in pitch between Knuckles and Sonic in 'Unlucky' ("Skill"/"luck"/"skill"/"luck"/"skill") - Knuckles becomes increasingly unhinged, while Sonic remains completely deadpan. Beautiful!
I still take issue with Knuckles' characterisation - at first I thought it was just my natural reaction after interpreting him to be of a very different disposition in other Sonic media, but at this point I'm just more-or-less convinced that he's a one-note character at the moment. Sticks got a treatment in an episode of her own that made her a lot more likeable in my eyes, but so far Knuckles, whenever the spotlight's on him, is just made out to be dumber and dumber. He shows some self-awareness about it, but overall that just makes him seem like he's got no self-confidence or intelligence.
I share your thoughts about the last episode: fun and amusing though the pacing is all over the place, especially near the end where the plot resolves itself literally in the last 30 seconds and then just stops. I like that Sonic, without a sense of purpose, basically turned into what I expected: an annoying arsehole. I was expecting his paranoia to be mirrored by Sticks' similar take on the lack of Eggman's presence, but alas, she doesn't even get a single spoken line in the whole episode. Guess her voice actor had the week off or something.