Mortal Kombat vs fighting genre; What can other fighters learn from MK?

[Azzanation]

MK was overrated but interesting in the 90s. It was amazing because it pushed the envelope of blood and gore in the industry. However the mechanics were very bad. The SNES version had so much delay with the attacks and the hit boxes were so inaccurate its laughable.
Many games came out after that polished and improved upon them. In my opinion, KI on the SNES (tho wasnt perfecf) pushed the fighting genre forward due to its speed and combos that its now a standard among most fighting games. Go play the originals of Street Fighter 2 and MK and see how slow they are to play where as KI was all those games on crack and still offered Blood and finishers aswell.