Soldato
It's actually starting to frustrate me quite a bit. I'm finding myself not able to change the course of a match like I can in bf4. I also find myself not getting very many kills, which compared to how many I normally rack up in bf4, it feels like I'm totally sacking. Only just bought my first gun, the p90, so hopefully that allows me to get some kills now.
It will change once you unlock the K10, M416 and M16A3. You can chop and change on any map with these 3 guns. The shotguns are great on maps like the block.