What you are experiencing is totally NORMAL. The reason why your current output is so liquid is that your stoma is very high up in the intestine. Once you have your reversal you will have more length for food and liquids to travel giving you intestine more time to absorb fluids. You might also want to try bulking agents after takedown. Products like metamucil (take the recommended dose in only 1/4 cup of water), citrucel, and metamucil wafers will help absorb liquids and firm up your output.
The mucous coming from your butt indicates you have healthy tissue down there. Once you have your surgery and you have waste coming out, the mucous will not be as evident. Everyone, even those with colons, have mucous it's just normally disguised in the bulk of stool. Don't worry, sounds like you are right on track.
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