I would think you could get decent games tethering from an LTE phone barring ping. Some LTE is faster than wifi but I’m not sure what the pings look like. Could be an option though.
Ping is what matters when talking about online video games and latency. I just did a quick Google search and seems Verizon people on LTE get 40-60ms ping. I get 20ms at home (cable from RCN) and sometimes I can play online ok. I guess OP doesn’t have anything to lose by testing. LTE as a technology seems to be pretty impressive though. Folks in Australia reporting 20ms ping, 60Mb down and 12Mb up. Crazy.