Well we had 1 newbie, 1 power gamer who sucks at power gaming (I mean like he makes the worst characters it is almost a joke) and 2 I would say average players... I was trying to cut my power by multi classing. By accident I synergyed a pretty powerful character.
My problem isn't "Hey all multi class characters are powerful" it's "Multi class rules make it easier to make more or less powerful characters than you mean to"
I spent years thinking High level spells were the powergame. As such my default answer was to play a single class spell caster (Bard, Cleric, Druid, Wizard) as tier one power gaming. The idea of spreading out class levels delaying higher level spells known (and spell slots if not a main caster) being a hit to your power seemed obvius to me. The problem was I also assumed the GM was more or less right with how high we were going... 16-18th level. So I deversafied, and made a much better low level character then I thought I would.