I finally have time to reply, so here it goes:
What i'm looking for is another way to solve the issue, i'm not convinced what nerfed repair is good. Repairing is the core element of every player and when it's this bad your strategy is to ignore everything repairable and do something else all the time. It's all good what there are other tools but after earlygame basically all you do what other classes can't already do better than you is replenishing ledges and sniping, other equipment doesn't make it up entirely. Yes you have better mobility still, but in the lategame it often is not as important. In a way it's also counterintuitive what your minimap has so many pings and you ignore all of them. Playing doesn't feel whole. I'l try to explain it like that: most of the times it's what other classes either do their job so well so when you finish roping and droning you've got little to do, or it goes bad and hardcore-ish. In this situation scout is the one getting the most pressure, when it's the only class which seemingly can be in multiple places and do multiple jobs instead of the dead guys. When this happens it's when tools get to be hard tested and then it can be seen what without repair you can't really make it, while with regular repair you would and with toolkit you would. Not because of lack of skill or bad luck sadly, but because repair is such a big of a deal.
About delay to repair or stop, I don't think it's that bad, when repairing you already have delay around 1.5 seconds before or after and it's fine as you look around beforehand. For scout, he has drones to see enemy further and this would help, and keep in mind scout doesn't repair at all with current version unless it's table and he has yellow larva and nobody near to do this for him. Anyway, my idea is focused on making this task more dangerous, cos danger is in my opinion way more enjoyable to deal with than game mechanic balanced to be punishingly ineffecient. It's just one way of doing that, I was also thinking about repairing making loud sounds, grabbing nearby enemies' attention.
I'm honestly fine with toolkit nerfed repair speed, be it globally or solely for scout. Toolkit might repair too quick. I like when it takes long to repair something when it makes for good gameplay, for example when you have to protect the guy who repairs door with enemies behind it or the shuttle. You know, I would be fine if all big facilities would take 1.5 times longer to repair if this had more or less same effects to everyone.