I think it just means some miners are prioritising the block reward over transaction fees by not completely filling the block with transactions.

“Quick let’s move onto the next one”

Could also be a sign that miners are facing more competition which in a way is a good thing. (Less centralisation).

Possible negative is that it takes a little longer for a transaction to complete.

In other words, not as bad as it first looks. Tick tock, next block.