We start with the positives.
-The graphics are captivating.
-The combo system is much more advanced than the previous title.
-It is considerably more difficult than the previous title.
-The cameos are a welcome change as they add imagination and many options to your gameplay. This results in making the gameplay as non-repetitive as possible and allows you to engage with the game for months. Yes, not just hours, but months.
-The roster is very interesting, as it has added characters from the PS2 era.
Negatives
-There are quite a few online bugs.
-In the tutorial mode, there is a specific part where there is a sound bug.
-Sometimes the buttons are not as responsive, especially when using the Cameo.
-There is already a 90% combo that you can do with online videos, something that shouldn't happen.
Final review
Better than MK11 since the restrictions have been lifted and the game no longer punishes you by making combos. However, the game could be a little faster and the dashes more responsive.
At the same time, I would rank it lower than MKX and possibly even lower than Injustice 2.
My review is based on the initial version of the game. Some of the issues I mentioned may no longer exist with updates. At least, I hope so.