Hearthpwn

The game is still fun. The level of play has gone down within the years. I may be more critical as I age up also. 

Zentimo is fine on it owns. It's a low statted cards but it has a comboish mechanic that enables some pretty strong turns later on. He pairs well with removal as well (lighting bolt for possibly 9 damage is a cheesy example). 

Kragva is just nice. It gives you value and tempo (spells can't be run more then twice, giving you a targeted redraw is nice). 

You could try your hands on a midrange style of Shaman and involve Shudderwock (which won't rotate) and some decent battlecries you possess. If you have Hagatha, you're in for a ride with Shaman in the next months at least. 

If you fear you don't want Unstable Evolution because it rotates out, I'd simply wait. Don't waste dust on something you won't enjoy just for the sakes of trying it.