I disagree with your comments about Joe Orteza's models. I thought those were stunning and they often included bits from GW models. Those were works of art and he obviously put a lot of time, money, and love into making those models.
However, cheap-skating around with toys, Coke bottles, etc so you don't have to paint I find disappointing. Those "conversions" or "proxies" are rarely painted or have any creative effort put into making it represent what the rulebook describes. However, the guy who converted Mr. Potatohead into an Ork Stompa obviously put the time, love and effort into converting and painting and I have no problem playing against those models.