I'm a bit undecided about the design!
I'm forever replacing rear discs and cleaning out the calipers - especially the VW stuff that need attention every year, unless the car does a high mileage. The state of some of them has to be seen to be believed! Try shifting the caliper bracket too....spline head bolts and tight as hell
On the disc / drum type the shoes hardly ever wear out and the adjusters rarely seize (thankfully) and so long as they are adjusted tight the handbrake works well.
A Toyota design has the drums exactly the same width as the shoe so the drum comes away easily - a good one. Try that with a Freelander
I had to split the old discs off that one.
Best, I think, to pull the caliper slide pins out and rubber grease them too - even if they do seem to slide ok.
Curiously, the discs fitted to Kia /Hyundai are the best quality I've come across - and that includes Audi and BMW.
Keep up the good work, Mr. Spanner - always enjoy your posts!
John