I would agree with this too. Although I would do this a little differently. I wouldn't touch the base reload value of the main gun. I would make a vet 2 bonus for it's reload instead. As for the Tulip, it seems it already has a high chance of dealing criticals, so nerfing the damage shouldn't weaken it too much and Tulips can take of the role of a snare instead. Making it cheaper would be needed though so maybe 50 Munitions per use?
I like this idea.
Tulips act like snares and do vehicle crits instead of being ICBMs that allow the Firefly to instantly kill mediums.