I thought I already answered most of your points and didn't want to repeat myself, that's why I ignored the rest of your post. You're assuming that it's a given Spurs would have performed better/got a result yesterday if they adjusted their tactics to something that doesn't really suit their squad but at the same time fits better against Liverpool. I don't take that as a given and believe they could have lost anyway considering the performance Liverpool showed and the missing players in the Spurs side. This Spurs team isn't necessarily suited to defend deep and play that way, therefore not really comfortable exploiting the flaws in Klopp's tactics. If that's the case, sticking to what you're good at, can be just as successful if not more than adjusting to the opponent. You can't really compare it to weaker sides, who play that way all season long and get a few positive results against the odds when playing top teams.
Comparing Poch's general tactical approach to Martinez is a bit silly, Poch is much more flexible and cynical anyway and I said various times that he made a few mistakes yesterday and will learn from them.
However, I still believe in my general point, that trying to find solutions to beat a pressing team like Klopp's Liverpool side through technical football rather than by defending deep and playing long balls is the way for English clubs to improve in European competitions. The fact that you'll get a few bad defeats on the way until you've found a way to do it, doesn't mean that it's the wrong approach in general.