Personally I find that the new healing bubble changes are incredibly intrusive in terms of appearance. I personally play on a small enough screen that the bubbles will take up a good chunk of it. I can't even see the top of the dang thing. It also feels like an un-needed change? It's not exactly going to stop people from standing outside of it and frankly I almost feel like the people who already don't stand in it are going to be standing even further out because they don't realise it's for healing and not the boss dumping an AoE in said circle.