Please read if you think Tristana and Miss Fortune need a small buff.
Well.. I wouldn't use "small" because I think it improves them a lot. . . For Miss Fortune, reduce the Q delay according to MF's attack speed. (just like you have just applied on Trist' E in the last patch. (I hope she gains 5 additional movement speed as well as little slow effect on her R. For ex, 4% slow per bullets, lasts for 1sec.)
This wouldn't increase her power level rapidly but I believe it would definitely improve her kiting ability and power level properly. . . For Tristana, increase the cooldown of Q to 22/21.5/21/20.5/20; then, you double the CDR effect of Q on itself. You probably need to rollback the recent buff on E. (scaling 30% by hit to 25%)
According to LOLwikia, tooltip of the Q is currently, "PASSIVE: Each basic attack against a target marked with Explosive Charge.png Explosive Charge reduces the cooldown of Rapid Fire by 1 second. ACTIVE: Increases Tristana's attack speed for 5 seconds. Basic attacks while Rapid Fire is active reduce the cooldown of Explosive Charge.png Explosive Charge by 0.5 seconds (doubled against champions)."
Applying my suggestion, the passive effect would reduce the cooldown of Q by 2 sec and the cooldown of E by 0.5 sec (1 sec against champs).
It would not significantly change her power level in early lane phase, but it would boost her power level in mid-late phase and make her hyper carry again with constant DMG dealing. You may reduce DMG of E or AS of Q appropriately. (I hope her passive increases her range by 8, currently 7.) . . Sorry for my interference in your consideration. Excuse me,a MF Trist lover. Thank you!!