Oh definitely, 16 miles and 4,500 ft of ascent, I can still move fairly quick in them big boots ! if it had stayed how it was early on I think I would have needed them. It was only that it stayed mild, no wind or anything. Looking at Halls Fell I think you'd be right about that ice it looked pretty icy from a distance at the top.
When I turned back at Raise there was considerably more snow cover on Helvellyn and Whiteside I wouldn't have liked to have been up there without an axe, so I think I made the right decision and still had a good day, should be some photos on my blog over the weekend. It was a good day.