Heiskanen plays the right side anyways, for better or for worse
Yeah. It really comes down to how comfortable and capable the specific players are, of playing their off side. Not all Lefties are created equal. Heck, there are some out there like Theodore, arguably Dahlin, who are actually
better and
more comfortable on their off side.
In this case, i'm fine with Heiskanen and Josi playing their off side, and i wouldn't be too afraid of Morrissey playing there either.
Now...if you have a bunch of Left handed D who are really uncomfortable playing their off side, and/or your coaches have a system that really emphasizes picking up pucks and being on that strong side...it can quickly become a serious problem that can be exploited.
The other real issue is when it comes to the Powerplay. Depending on what the rest of your personnel looks like, it can be really limiting to not have a RH shooter option at the point.
It's also kind of funny that you selected Weegar for the team with RH defencemen, since he's one of the only guys i can even think of, that i've seen play as a Right Shot defenceman at Left D.