No, I don't mean the engineer should stand still the whole time. That would suck. No, keep the jumping around. Keep it all. Just make it so that if he breaks the stream with the MCT, it starts to go back down to zero.
Also "keep repairing it or you lose it" isn't what I said either. It should be captured once and then ignored until the other team tries to capture it. Same as it already is. Just change the capturing process.
Hmm, perhaps. I still cant say I like it, since the current method makes it very similar to building health in that the team who captured it can easily neglect it and leave it low health so that a cheeky member of the opposite team can come in and quickly capture it...or at the very least remove its ownership.