No matter what we do... we either address the RHD situation first, or don't throw temporary bandaids around like this. Simmonds is a RW.... Does he replace Nylander, Marner or Kapanen in the lineup? Simmonds isn't all that useful as a LW... So, unless one of those three are moved for RHD, obtaining a temp RW solution, for useful future assets... doesn't make much sense to me.
We would want a LW... though then then then the question becomes... which line do they play on... Does the beloved Hyman get bumped to bottom line? Marleau? Johnsson who is something like 15 points in his last 17?
Personally... a RHD has to be obtained first.... with either Kap or Nylander going the other way... then you can worry about a bigger RW, whether it is a short-term solution like Simmonds, or Anderson, or Gauthier from Carolina. At this point, it's kind of a dominoes effect.... a Big guy on the fourth line... it's not really going to impact things much, and the costs would be too high.
Personally, I think we need to obtain prospect size, or draft it, for long-term solutions... We shouldn't be overpaying for size over skill, for short-term fixes.