It's fun for PvE players, yes. I enjoy missions and quests. They're nicely build up and the atmosphere including voices is amazing. If you play for free, you can have 2 characters on each server. That is not many, as there are 4 classes, 2 factions and many races. They also got less servers now, but they seem to be more stable than any server before (
).
I already saw the ingame shop is selling quite important stuff.
An example: If you want more inventory space you would usually buy it for credits (ingame currency). But now only customers can do that, and anyone playing for free got to buy those for real life money. Another example are equipment pieces that can be bough for real life money. I just took a quick look at it, so I cannot say much about it. Can't say if that actually changes much for PvP. Besides, I've never been interested in PvP in swtor anyway. I bought it just for quests back then.
Edit: You can have 2 characters IN TOTAL... damn, now that is stupid. I already created 10 characters when I played at release. I've got to delete at least 9 of them now to create a new one... even with subscription only twelve are allowed in total...