I do just renovate sections of our own flower beds, rather than whole beds, Critter.
I do also agree that different gardeners have different tolerances for perceived imperfection in perennial beds.
In fact, chasing some part of horticultural perfection in perennial gardening might be a fool's errand - perennials just do their own thing - such as run amuk (you can usually avoid those) or, if they don't like the growing conditions, die!