Really? Look at their pack options (
https://en.wikipedia.org/wiki/London_Welsh_RFC#Current_squad). Last time they recruited some decent props, this time their first choice prop is Nathan Trevett.
London Irish may not be great either it must be said but surely better than Welsh (
https://en.wikipedia.org/wiki/London_Irish). Court, Paice, Cross, Leo, Cox, Sinclair, Treviranus and Narraway should have enough pedigree at Premiership level to keep them up, even if it's nowhere near good enough to be silverware challengers.
Don't think Welsh's backs are all that either tbh. Weepu is fat and just come back from a stroke, Barkley, May and Ross all nearing retirement, all the rest apart from maybe Molenaar very unproven at this level and barely got a game at their previous teams.
Looking at the squad's I would rate Newcastle (
https://en.wikipedia.org/wiki/Newcastle_Falcons#Current_squad) as on paper the one Welsh would most likely be battling to avoid bottom place with. Has Brookes at tighthead there turned out to be any good out of interest? Was highly rated by some, kept making England Saxons squads even though he never got a game at Tigers.