Plaits is probably my least favourite mutable module - although I do use it quite a bit - even if it is just for hats... I must spend some more time with it again...
Tides is fantastic though - I have both versions - I especially like the phased mode on the one you have - although both get used in nearly every patch I make - great for both audio and modulation
Marbles - I like it a lot - one thing that helped was increasing the length of the gates so that they were more useful for opening envelopes (as well as just triggering percussion)
When I look at your racks - both versions - I see a serious lack of basic utility modules - these massively help in terms of plumbing... sub-mixers, matrix mixer, mults, logic, rectification etc etc... when extending I'd be tempted to keep the doepfer case too - so you have room to add a lot more of these...
as for flow - I'm guessing you mean workflow here - ie patching things together - as I said above more utilities, which should be distributed throughout - but also I find something along the lines of the layout of the 2600 - from top, left - sound sources, modulation, effects (including filters) and controllers/sequencers and end of chain mixing at the bottom - but this assumes that you actually have the cases arranged as depicted, one on top of the other
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities