I absolutely love the idea behind this; I've always wanted to see tactically interesting shields, but could never conceive of how. After trying this out for a bit, I wanted to mention a couple considerations I had in mind. (I don't want to pester you for features, but I figure there are some interesting discussions to be had if nothing else.)
- It may add some desirable complexity and counterplay if certain damage sources could (optionally) bypass shields, particularly grinders and collisions.

- In the current design, an active jump drive always will be drained by damage, even in situations where it may have been more desirable leave the drive charged. In a combat-focused environment, I expect that this adds interesting decision-making to fights; the longer you stay engaged, the harder it is to escape.
One factor that I believe could negatively impact other playstyles, however, is that both parties are locked in the instant bullets are exchanged; the only way to jump out of a fight would, in most cases, be to have a secondary noshield jump drive ready to go.
I think it could introduce further decision-making if it were easy to toggle shield generation on the fly via a setting; particularly, I was keen on the idea of toggling recharge off to raise shields. I believe this would lend itself well to interesting situations; a charging ship would be vulnerable, leaving shields up wouldn't always be most desirable, and a captain would have to weigh the risks of continuing a fight, attempting to rebuild shields, or attempting to flee.