I would really like the to use the coupons to offer a basic discount to certain customers and for certain promotions whereby they can have say "at least" 20% off any item.
where items are less than 20% but less than rrp they get 20% off. Example being 15% off item, 20% off coupon = 20% off. not 35% off. There could be a time whereby 35% off is wanted like a extra 5% off sale but generally our pricing is competitive enough that we'd not want to offer a sweeping % off everything.
For items more than 20% off. use of the coupon would have no effect in this example.
I like to think it is as easy as adding another checkbox to the coupons right next to the block sale items... I know it's not
We'd then be able to hand this coupon out to mountain rescue teams, local businesses, contributors etc etc we'd also be able to give coupon codes out to influencers whereby we can effectively track conversions that can be attributed to them.