Thauvin got more goals from the wing than Mounie got up front in a similar amount of games. The French league is just as hit and miss as the Dutch league imo and his record was about 1 in 2.5 games which isn't much off Riviere's 1 in 3 for Monaco before we signed him.
I see no reason whatsoever (short of an injury ridden season) that Gayle couldn't match the sort of numbers (or better) Deeney, Rondon, Vokes, and a couple of others got last season. He managed 7 in only 8 starts (15 sub apps) his first season at Palace, 5 in 11 starts (14 sub apps) second season, and 3 in 8 starts (8 sub apps) in his final season (which was under Pards), he's also no doubt improved since then and has a bit more confidence about him rather than being in and out of the team.
I'm not opposed to us signing a striker but our focus should be elsewhere as imo striker is one of the harder positions for us to improve on (our starter anyway). We'd also still be lacking in creativity which is the main problem I think, I'd rather we spent big on a player for that number 10 role, a central midfielder, a left winger, a left back, and perhaps another CB.
It's a shame the Lewis Holtby rumours seemed to be bollocks as I would have liked a player like that in behind the striker.