I had many complications leading to my ostomy. Long hospital stay; Rehab facility; Home Healthcare and finally External Physical Therapy was the journey I took to recovery. The long journey did have its benefits because I had plenty of medical help learning to manage my ostomy.
I was told by surgeons that if I had the reversal, I would probably have the same complications and perhaps more. They also said the reversal would have to be performed by a surgeon that specializes in that type of complex reversal. Since I had no problems managing the reversal, my wife and I decided not to have the reversal. As JB said read & learn what you are up against and make an informed decision.
The following is information I gathered when contemplating having a reversal.
A VA study analyzed outcomes and timing of ostomy reversal surgery, perioperative complications, and differences between colostomy and ileostomy reversal outcomes in veterans undergoing elective surgery for diverticular disease.
   • 751 received a stoma
   • 407 had ostomy reversal surgery (54.2%)
   • 243 had colostomies (59.7%)
   • 149 had Ileostomies (36.6%)
   • 15 unspecified (3.7%)
   • Median time to ostomy reversal was 5 months
   • Complication rate after reversal was 23.1%
   • Surgical site infection most common (9.1%)
Factors associated with lower likelihood of ostomy reversal:
   • increasing age
   • hypertension
   • A higher ASA classification indicates a more severe level of systemic disease and a higher risk of complications during surgery. Here's a brief overview of the classifications:
     • ASA I: A normal healthy patient.
     • ASA II: A patient with mild systemic disease.
     • ASA III: A patient with severe systemic disease that limits activity but is not incapacitating.
     • ASA IV: A patient with severe systemic disease that is a constant threat to life.
     • ASA V: A moribund patient who is not expected to survive without the operation.
     • ASA VI: A declared brain-dead patient whose organs are being removed for donor purposes.
   • higher ASA classifications (III, IV, V) indicate more severe health conditions and higher perioperative risks.
   • There were no differences in postoperative complication rates after colostomy vs ileostomy reversals.
   • Reversals after 4.6 months were associated with 3.4-times higher odds of complications.
• Creation and reversal rates are similar between the veteran and non-veteran populations in the United States.
• Delays in reversal surgery were associated with worse postoperative outcomes.