Gives more challenge, often requires more thinking of the future and present rather then just the present. It is just my preference though I know a lot of people would prefer WoW to have more of a skyrim like battle style. But with a skyrim battle style it would just all be the same and no skill involved in kills like you have in WoW.
Back to FF I preferred FFX, FFVIII, FFXII style as to FFXIII. FFXIII had to use the worst of all styles. Now FFXV is using a KH style which is still fun and will probably be satisfying but I find it to easy.