Segwit solves the "2+ minute troll block validation" problem by enabling Schnorr (and resultant tree) signatures.
*takes off pedant hat*
Good. Now there's room for a different hat on your head.
SegWit doesn't solve the "2+ minute troll block validation" problem through Schnorr sigs either. Some future feature that is post- SegWit may. Or may not.
^

Pedant, my ass.