A Lightweight Matrix Suggestion for MixColumns State of AES
I'm not sure to what paper you reference with "30th paper from FSE 2018" because in this list the 30. paper is not about implementing MDS matrices. As the 31. paper is, I assume you refer to this, entitled "Shorter Linear Straight-Line Programs for MDS matrices".

When you take the XOR count as a metric for efficiency, you can just compute this for your matrix and end up with an naive XOR count of 144, an optimized XOR count of 103 when using the SLP heuristics from the above paper. While the 144 XORs for the naive implementation are better than 152 XORs we would need for a naive implementation of the AES MC matrix, the later can also be optimized with SLPs and this will give you an implementation with only 97 XORs.
So, when only using the XOR count metric, it appears that your matrix is not more efficient than the AES matrix.

Of course it also depends a lot what application you have, if you only need to encrypt stuff (e.g. using AES in CTR mode), looking only at the "normal" matrices is fine, but when you also need decryption and thus the inverse matrices, these have to be implemented as well.