My opinion is that With Fire and sword is a big improvement on Warband.
Marriage is gone:
Along with courting the whining *****es...Great
Tournaments are gone:
Great they where boring without the Arena Mod anyway. Its out of place at this time period.
Merc camps:
Much better than hiring villagers. You can now equip them with the kit you want. much more realistic
Banking system:
Great idea..You can now get interest on your money or takeout a loan
Ordering special items
another great idea. love it
Sending your companions to college....love it
Battles have changed with musket and grenades:
Its a nice change. forces you to use tatics... another great idea
See for yourself. As always you can try before you buy. You can play the full game until level 7. make your own mind up.