plaster admix?

[bananaspark]

I've redone a small stud wall with plasterboard, but had to use leftover plasterboard to hand (cos I cant be bothered to carry new sheet all the way up again), so consequesntly I didnt follow best practice - some board segments only span 1 stud and not all are staggered.
But the boards a screwed in solid, and looks like a miss match of very large rectangular tiles.
As theres probably a bit more flex than normal, is there a recommended way to finish this wall? with a more flexi plaster?

 

[noseall]

tape the joints properly and don't skimp on the finishing plaster, as this will stiffen up the boards.