Honda DCT in your future?
Have ridden with you (Tioga Pass a while ago) and you can haul the mail, so doubt you want to settle for a Honda auto tranny.
Sliced my left index multiple times, luckily remains whole. Know a few folks that have done major revisions as have you. My experience follows:
The tip of your fingers is a unique set of nerve endings. If you clip them off, the "nub" won't replicate their fine sensitivity. Hopefully, as has already been mentioned, you will feel pressure sensation and that'll leave ya wanting, but better than nothing.
Keep it clean! Infections will cause swelling, leaving unfeeling scar tissue and retard the process of healing in general. Nerves will recover last. Be patient.
Finger cots. You know, condoms for your digits. If the wound is not fully sealed and callused, put on protection.
Strengthen the non-injured hand. We are bi-lateral animals. The body will send out the stuff to bolster muscles to BOTH sides. Read studies about less atrophy in patients that exercised a limb in a cast and the lessened state of atrophy in the damaged limb.
Eventually, push the limits. Though more a wrist and general hand exercise, digging through a canister of beans or rice is a good method of strengthening the fingers. Put a small object in your hand. Bury it by digging through the dry beans/rice. Extract hand, then do it all over again. Repeatedly. Will dry your paws, so oil up after. And no party bean dip served at your house during this time.
Nerves are tricky, but with tip gone, best you can hope to achieve is control and some pressure sensitivity. At least that's my experience.
And, on the bright side, you'll have one more part of your body that will warn you of impending weather change. Lemonade!
Good luck!