core should exactly mirror network consensus. anything else is irrational. there is absolutely nothing core is doing that is against the rules of the network. if you don't like the "spam" transactions then convince miners to fork. in the meantime your mempool filters are about as helpful as homeopathy.
Discussion
Mempools have always been more strict than consensus, nodes set the rules for the network. That's how Bitcoin has always worked. A fork is unnecessary and stupid. Miners deciding to break the rules set by nodes and route around them is a miner centralization issue. Datum fixes this.