Ability to change tempo but keep relative chord positions

It’d be cool if we had an option to change the tempo after all the chords are laid down, and have the chords play at the same pace, but the drums follow the new tempo. There are times when I think the tempo is gonna be like 150 but when I play it the drums are too fast so then I want to change it to 75 to make the drums halftime, but now the chords are too slow. Thanks!

On 2nd thought maybe what I really want is halftime option for any drum loop. Because on this song for example I’m pretty sure it’s actually 150 because 75 is only 2 bars for a loop.