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I have an indoor, wheel on trainer - while indoors I notice the Chordal Action in the chain.
The Bike is a couple of years old now - I have replaced most consumable parts except, chainrings, bottom bracket and jockey wheels.
Shifting feels fine.
I do think my chain is pretty slack on the high gears - but only just about fits in the lowest.
Chain and cassette are fairly new, less than 500 miles. Chain is lubricated with "Finish Line Ceramic Wax"
Would it help if I changed the jockey wheels ?
Perhaps your chain is too long by a few links and/or an adjustment of your b screw could allow you to shorten the chain.
Switch to larger chainrings and cogs. The old "standard" 53-39 rings and 12-something cassette were standard for a reason. The tightness of the chain doesn't really have anything to do with this problem.
