The reality for me is that the more consistent my golf swing is, i.e. mid-season form and playing on a reasonably consistent basis - the more helpful a launch monitor might be for me.
I generally avoid purchasing new equipment of any sort prior-to and immediately-after a long layoff for this reason specifically, unless it's just too good of a deal to pass up and I don't mind eating the investment if it doesn't pan out. And that is rarely the case for me, being a lefty especially.
The last thing I'm worried about is my spin rate and launch angle in April/May. I'm simply trying to remember how to get the ball on the club face and airborne again at this stage of the season. Obviously if I lived in an area where golf is played year-round, that would probably change.