Seth is more suitable for mind games, because you always end up in a guessing game. Option A won’t save you from attack B, etc. Gen is a more footsie oriented character and simply lacks options. The fact rushdown works is generally because of the lack of match-up knowledge. I rely on poking for 50% of the time against my sparring buddies/rivals.
1-frame links can be executed without plinking, but you have only 1 frame to get it right. With plinking you double your chances.
And according to the frame data sheet on SRK it’s definitely a 1-frame link.
For wake-up situations, blocking is simply the best option. When you expect a meaty fireball or (command) throw, EX Oga is a good choice. Then there’s the possibility of parrying on wake-up (see the youtube movie), but I only recommend that against meaty dive kicks, and only once or twice. This doesn’t rule out EX Gekiro, but with 7-frames startup it’s definitely not a good choice. And when you got knocked down by Gief…best of luck.