Ha! Yeah, I voted for it.
I got a reply about this from Epic via UDN:
" The Rerun Construction Scripts setting can have a heavy impact on performance, so it only applies to the timeline UI, and isn’t meant to work in games/simulations, which is the case for MRQ.
In most cases behaviors like this can be moved to the actor’s tick or another function. Migrating these bits of functionality into one or more functions should allow for it to be called from both the construction script and tick, so the construction script can still set-up the actor, and the behavior can be mirrored on a per frame basis. Setters are another option for behavior to happen in response to sequence evaluation. "