Hi there,
1st, I'd like to completely agree with John P. : of course, tabbed TLs are the only solution that can be suitable to everybody,
it's obvious.
You want to access to a portion of clips on another TL ? You click on the next little tab you just opened before and the TL switches to this new one instantly. You want another ? open it on another tab; you don't need it ? close those you won't need anymore.
Tabs are just small and easy to switch to. Look at the old FCP7* manual page pic
here : on the top left, you have this "master sequence" name of the timeline and you see that the grey bar on its right is ready to accept lots of other TLs tabs.
[*regardless to the fact anybody knows Premiere has always borrowed a lot (everything ?) from FCP7, this example is universal and can be found on any NLEs, just my own example here]This could be easily implemented in Resolve and would be highly appreciated by editors.