Can't you do this with aux bus automated sends and draw the automation of the send levels?

This is old-hat for every other DAW on the market. Those of you that go on about how RB is as much a DAW as any other, well, if this doesn't work - then it's another strike against using it as a typically featured DAW. No, other DAW software doesn't autogenerate tracks - they don't claim that - they claim to be a Digital Audio Workstation, for which this kind of work is a walk in the park.

Honestly, this is VERY common to do this with automation via aux bus sends, where the different effects are on aux returns at 100 percent 'wet', and you just vary the send amounts for the different effects at the various sections you want the effect to be audible.

Is RB still limited to volume track and pan automation only? I thought that got fixed awhile back?

I should ask to be put on a beta evaluation team, since I would try stuff that is typical elsewhere, but I think PG only sends beta evaluation invites to current product users. Seems a bit of a mistake to me to do it that way. I would think one would want a mix of current users, and users lurking in the wings waiting for some things to catch up to what the rest of the market currently uses regularly. Real automation is one of those things.