First scenario:
1. If I were LaFleur, I would have gone for the onside. Kicking it deep and hoping for a fumble seems like a half-assed version of the onside kick with the same intentions and the same risks (since there was no functional difference between the Bucs scoring and the Bucs just getting a couple of first downs). I'd rather call the play designed for getting possession back rather than asking for a perfect individual strip and recovery.
2. I remember my dad brought this idea (Mickens should have ran for 2 more seconds) up when the play had just happened. My response was that maybe he should have, but it probably would have taken him running significantly backwards to do so, which would have really backfired had the Bucs needed to punt after. There were not even close to 2 seconds of running either forward or laterally.
Second scenario:
1. Yes, the offsides was 100% intentional. We saw this in another game this season (or maybe last), someone with a better memory can say who the teams were and when it happened. My gut says it was someone from the BB coaching tree, maybe Vrabel. I thought it was stupid then and I think it's stupid now. The premise behind the decision is "2nd and short? No way we stop em there", which to me is absurd. You're trading the down for an extra timeout, but I think the down is still more valuable. The defense is up against the wall in this situation no matter whether it's 1 or 10 yards.
2. Arians was right to accept the penalty. The reason he accepted it is the same reason LaFleur was dumb to order the intentional penalty: the 5 yards ultimately helped the Bucs.