The best way to avoid the 150% kill is realizing that Bowser Bomb can punish in 99% of the cases Klaw can, and just learning to switch over to it. It is more high risk, but that just means you need greater certainty.
I should record more matches. I saved a few of ours tonight. I guess I feel like I am not that good at the game, so I shouldn't waste people's time. Then again, only one other Bowser player has impressed me on YouTube.
From spending a little time in training I can already see that dash slash goes with Bowser bomb well - it's easy to do a reverse bomb after doing an aerial DS, a diagonal input works. While standing or running, you have to be much more exact, a diagonal input will do a DS rather than bomb. I also figured out the timing for a safe DS onto stage from the ledge. Yeah, even in FG I catch myself doing klaw when I could have used bomb to punish harder. Then again, I whiff a lot of klaws... but bombing from a DS approach is much more certain, the opponent is already on the defensive and less likely to move out of shield.
As for videos, I mean, Calmanimal has his moments, but there's not much else. Every once in a while an ok Bowser player gets on stream at a random tournament just through luck of the draw, that's pretty much what we've got right now. Anyone playing competently would be welcome, the bar is pretty low. If my phone wasn't complete shit I'd be uploading a number of replays right now myself.
Edit: more time training - DS to dtilt has more range than DS to ftilt or jab, Bowser keeps his forward momentum slightly as dtilt starts. Wish you could DS past someone and do a pivot grab, there's no way to do that instantly it seems.
Edit edit: I've been trying to get as close to the ground with my DS'es as possible (I figure unless I'm trying to go over someone, the lower the better for getting out an attack), sometimes Bowser cancels the DS entirely as he hits the ground but still slides a little over a Bowser-size length. Can't do it consistently though.
I hope the upcoming patch fixes custom characters reverting back to default colors, that is such a pain. Half our matches were default vs default color Bowser because of that.