Well if atma made you quit, you might like that they're increasing the drop rate of atma in 2.4.

Also, the i100 gear is going to be easier to buy and upgrade to i110 with the cap being lifted on soldiery and the lockout being removed from ST.

So you should be able to get back in and gear up fairly quickly to move onto the newer content. Luckily, you quit near the time of 2.3 so you're only one patch behind, so to speak.