Welcome aboard, Steve-o!
As far as the first trade is concerned, it really looks like a win-win situation to me. If one team is plugging a hole at 1b while the other does the same at ss, the swap of 2b's looks like a good way to make the deal fair. If both sides can fill needs this way, it looks like an excellent deal.
The second deal is a lot harder to analyze, since all three players have question marks surrounding them. Lots of folks think Lowe will go downhill in the second half, wilting under the unaccustomed workload. I'm not sure about this, but his last starts haven't been all that sharp.
Armas was also hit hard twice in a row by the Braves, but he should remain solid. Pudge is hit-or-miss: if he plays at the level he's capable of, he's a steal in this trade, but that's far from certain. I can understand both sides' logic in this deal, but I think I'd rather take my chances with Pudge and Armas.