Personally I think Premier League experience is very important, here's why:
One of our best strengths this season has been the unity in the dressing room, how well the lads seem to get on and you can see that on the pitch after wins. I think the implication of "Premiership experience" is that not only is a player adapted to the new higher level of football but presumably integrated into the lifestyle and language, if you watch Wilson and Mayenda they're in on the jokes, the banter is flying and they're part of the ingroup, when you bring in a larger number of players you're always a little worried about the players adapting to the level but it's the off the field stuff that will make them comfortable, so I'd be a little worried about upsetting that balance.