Thanks for the replies everybody. I'll see what I can do about the training session, and it looks like there could eventually be a patch that changes the WPF system, so there's hope yet. In the meantime hopefully the wpf penalty isn't nerfing my PT to lower than the 10 I had before.
Pretty sure it's taken me about 3-4 months to go 32-33 at gen 4, that's playing just about nothing but siege. So it could be 3-6 months before I make 34, if ever. I worry the NA siege population will have ebbed by then but we'll see.