Having been one who's rebuilt many a wing, one of which was a 12' span glider that had both wings break about half-way out from the fuselage, I'd say that you shouldn't worry about your repair. If you have to either splice the spars back together with some ply reinforcement (both front AND rear!), and then piece in some sheeting, you'll be fine as long as the glue joints are good ones. The difference in the strength of the spars from one side to the other won't make a difference in the end. You may have to add weight to one tip to laterally balance the repairs on the other wing panel, but that would be about it.

Even if the wing had a bay or two torn out, you can splice in spars and leading edge, add new ribs and sheeting, and you'll be fine. Technically, the new ribs don't even have to be exact, just very close...it won't look as good, but it will work. Just make sure everything's straight. The best key, though, is to make sure the splices don't line up...you don't want the upper spar splice to be at the same place as the lower spar splice. The same for the leading edge...you don't want its splice to line up with the spar's splices. Sometimes you can't avoide it, so you just have to rely on the plywood you used on the splice to hold things together.

If you're careful, a repaired wing will be every bit as good as the original, and only you will know about it.