Fair i know little but with more support, wouldn't britain consider staying? Also wouldn't the ulster forces be better trained, and armed plus they can be given the equipment such as tanks and all that while the nationalists wouldn't? I bow to your knowledge; but were the irish loyalists that weak and not important they cant change anything?
It's difficult to call, remember the UVF were set up to resist the British Governments choice on Home Rule, and the fallout caused the Curragh Mutiny so how willing the UK would be to divert equipment to them? Moreover I think you're relying on hindsight they wouldn't have. In 1914 at the Outbreak, Redmond called upon the Irish volunteers to serve to show support to the Empire and they did. There was no reason to think in 1914/15 that there was going to be an insurrection in Ireland during the war, at which point the question would be why hold back 10's of thousands of troops when they are needed at the front and there was no visible threat in Ireland (which already had large numbers of troops present).