I don't mind the Matterhorn or Giants Causeway bonuses get lost. Which probably reflects my feeling that those bonuses are just very silly.
The losing combat experience is not great. It really mucks you up if you're rushing units. And it's very annoying given it's such a pain building both Encampments and their silly buildings.
The England movement issue ... just annoys me, really. Without that movement point, England's ships aren't better than anyone else's really. I mean, it's hard enough getting the bonus in the first place given you often build a few ships before you have Harbours and your Sea Dog's captured units don't count. Losing the bonus is then just trolling. It's not quite as stark as that, because you do still get extra Great Admiral points so your naval units are still sort of a bit better, but yeah, it means England doesn't really have anything that special in the Naval department.
But what really annoys me is that, in principle, it's just such a great mechanic. Not powerful; just fun and flavourful. "No England, you don't just get some dope Navy. Stop complaining. Go research Harbours. Then go building the blighters. Then build your ships. What, you've done all that? With no production bonus? Well, no. You still can't have a unique Frigate or IronClad. A Jong? You must be joking son. But okay, you can have a few extra Great Admirals and an extra movement point. Nope, it's not a combat bonus. Nope, no healing in neutral territory or silliness about raising. But listen here, if you're cunning and wily and deliberate, you'll find you can do some very clever things with extra movement..."
If they can't fix the mechanic for RNDs or for Encampments, then fine. But then FXS, please just rework those mechanics to be something which does work.