That's a great example! It wasn't by choice, but it was essentially pollarded, its' structure altered. You could try to encourage a future tree-like appearance again, by removing all of the branches that don't contribute to that shape. You seem like the type to be in the garden often enough to do it gradually, a few couple branches this week, a couple more next week, until eventually, what's left has a tree shape you like. The more gradually you can do it, the less likely it will be to make suckers/the less suckers at a time.
Sure was pretty, so sorry that happened!! The blooming might be more heavy with the current lollipop shape, but I also prefer a more V-shaped tree-like structure.
