I can't advise you on your decision but I did have a reversal and have never regretted it. I have no diet or food restrictions and my jpouch gives me the freedom to backpack which I don't think would be possible with an ostomy. If a reversal didn't work for you, you could always go back to the ostomy or a k-pouch. But you won't know unless you try.
dx proctitis in 1987
dx UC in 1991, was stable until 1998
1998 started prednisone, asacol, pentasa, nortriptylene, ativan, 6MP, rowasa enemas and suppositories, hydrocortisone enemas, tried the SCD diet, being a vegetarian, omega 3s, flax, pranic healing, yoga, acupuncture, probiotics
2000 lost all my B-12 stores and became anemic
2001 opted for j-pouch surgery- now living life med-free