I'm with J$. Your movement is beautiful.
In the Falco matchup, I'd say strive to play more aggressively. Kill harder, not smarter. Falco is super fragile and isn't hard to KO if you can get hits/grabs in and get him off the stage. Trading hits is also good in this matchup because he'll usually die at lower percents than Bowser will. If you can get him to play on the defensive and then take apart his defensive game and get gimps, you've won.
As for Peach, I'm not sure what to say. You're already very good at the matchup. Try not to catch turnips, or else experiment with dropping them (Z with no directional input) instead of throwing them (think Home Run Contest
).
In general, try to mix things up. In those matches, you approached with wavelanded fairs from the platforms a lot (which the commentators called you out on). Work on your footsies and dash dances into running grabs. Use f-tilt, nair, and dash attack more and down-smash less.
Good stuff, for sure! Falco and especially Peach are really hard matchups for Bowser, but you almost made them look easy. Keep reppin' the Boozer!