Depending on what Rav4 model you get, they do have Toyota's brand new Dynamic Torque-Vectoring AWD system. The Limited and Adventure grades have that new system - the lesser models (LE, XLE) have the old school Dynamic Torque Control system, which is still decent in it's own right.
I had a 2013 Rav4 for 3 years and it was good for what I needed: Good MPG, very flexible and versatile interior, and the AWD system got me through two of Atlanta's worst ice storms.
I would definitely opt for AWD, personally. If you have the budget, the 2019 Rav4 Limited or Adventure are both very nice.