Core v31 is out and it includes an easier way to turn on asmap:

source

What is asmap, you ask?

There exist several attacks which can leverage weaknesses in peer discovery to partition a node from the broader network, for example in the case of an eclipse attack. While Core’s netgroup bucketing prevents too many peers from connecting from a single netgroup, a single AS entity can control many IP address ranges, and in recent years these IP ranges have started to change hands more frequently. What we want is a map of IP addresses to the AS they belong to, so that a node can ensure that it is not connecting to peers under the control of a single AS entity. By using the ASmap feature in Core, a node can further prevent a getting partitioned from the network.

Between this and the recently released private broadcast functionality (#1410542), it's starting to feel like I'm gonna upgrade.