24-7 is unlikely to be good enough to adjust properly to 4-handed.
3-betting range is likely unchanged - QQ+/AKs? Do JJ/TT make it into the range normally - unlikely.

Pre-flop I think is fine, but decide then and there whether you are playing your queens for set value.

Flop, is this one of those way ahead/way behind spots? Even against AcKc you aren't looking that great. As played i like checking turn behind for a cheap showdown, is he calling a bet here with worse? Once he check-raises the question is simple - how often are you good? I think not often enough...

I look forward to criticism of my thought processes here..