Nice tank, can't wait until it evolves more and more.
About the e tennelus, I bought some too and when i put it in my tank, a lot of the leaves melted like yours. But, i kept it in there to see what would happen and already new shooters are shooting out and new plants are starting to bud while the mother plants are withering away.
I think the crypts will grow back too, i hear that they do not like being moved much.
Shrimp might be a problem because of your angels. But i think that if you have a dense enough aquascape, the shrimp will survive.
Dont know about the other questions, sorry.
Your off to a good start though! (better than i was when i started)
Btw, i love your ph controller
