I just hit 50 tonight and I must say I didn't really have a problem with anything levelling from 10-50 as combat spec. One of my favorite moments on the journey to 50 was a huge battle that I had with an elite mob on Hoth that was 4 levels higher than me. He killed me, but must have had 2 hp left. I got so much confidence from that fight and didn't hesitate to jump head first into a battle from there on out. I routinely finish solo quest boss battles with more than 75% health. I don't know what to say to the folks that are struggling, but it IS doable. I haven't pvp'd hardly any, so I can't really speak on that situation.