dont use ortega exclusively- use other methods to take advantage of easy scrambles.
tips for recognizing PBL- the obvious, find a bar as quickly as you can on the top. know your bottom permutation and know where the bar is on an adjacent swap use your inspection wisely. dont just look for an L or a bar and the other pieces, look to see if you have 2 pieces stuck together correctly, 3 pieces stuck together correctly. also, when doing adj-adj, learn to recognize the AUF while performing the alg. for example, a U2 AUF comes from a checkerboard pattern on the opposite face. for U and U', halfway through the alg the AUF shows itself.
t perm on the bottom- R2 alg R2 auf? or you can cancel it R2 R U R' U'. . . = R' U R' U'. . . it just takes a little practice. for y perm, R2 F2 R2 y perm AUF, maybe there is a better way, but this is what i do.
how can u tell if an ss case is easy- all of the cases are easy, its just memorizing and learning the recognition. there is an SS thread, i suggest you lurk there to learn more about it.