Those characters are really brilliant!
I base mine currently on cents and plan to use them for some good Oldhammer fun. We tried it already with 10mms based as blocks and just noted the casualties with little dice - it works brilliantly!
Take your favourite Warhammer Edition (mine would be 4 or 5), replace all inches by centimeter and
- EITHER play on a smaller tabletop; a standard IKEA kitchen table suddenly will become a huge battlefield without looking crowded
- OR play on a really large tabletop for 28mm and start very far away, but double or triple the turns of the game. --> Dont forget a good number of terrain in this case.
It was incredible fun when we tried it and gave many units like skirmishers and light cavalry great new uses and it felt much more like a real battle!
KoW is nice but to gamey for me. We tried it and it was great, but then I played against someone who measurd every move moved just 2mm outside my arrow range etc... not my cup of tea.
Frostgrave on the other hand would sound like a lot of fun.