Of course, and i'm going to continue playing after that too. I played every expansion to some degree or another in retail, even up to now and i'll continue with the current cata. I do find paladins (prot at least) are a bit squishy, maybe i'm just geared wrong now, but it's all a learning curve and fun if you dedicate your time to it
I am slowly building up my alt army to get them ready for specific professions and such as well, I feel if you have a foundation around what you want then you're fine. I personally enjoy collecting materials, crafting stuff, getting gear levelling alts and the occasional raid when I am able to raid with my guild or a pug I feel is appropriate
Oh and let's not forget now we can also transmog lol. I forgot it wasn't retail so I kinda cried a little when I couldn't use my transmog XD I had to settle for the judgement set which I actually got in the classic era we just passed not too long ago, which is fine I like the look of it after all