Ugh. Jyoshua, people don't have to bait wakeup DP. You have to make them bait it by DP'ing. Then you just have to yomi whether he'll meaty you or bait you. Then you decide whether you still DP, upback, backdash, or block, whatever.
As for mashing out of pressure, I found out that I gotta mash earlier to punish certain gaps. If you see someone do, say, 2a 662a, by the time you see him dash it's too late. You have to start mashing when you block the first 2a, and maybe you can catch him while he's dashing.
Or, you just pick Mu-12 and just win despite doing nothing right at all.