The definition of a purge is to physically remove something completely, and I would like to see purges being scaled to the size of the target chosen by the purge.
If that base stretches across the landscape the waves from the purge should spread out accordingly.
I find it way to easy to create massive structures without any risk of losing it to the purge.
Even if you’re solo.
This is probably not a huge issue on PvP, but on PvE(-C) the purge is the only “threat”.
Granted in the higher level zones where purge level is at 5 - 6, it can be a challenge, but the purge, at least an NPC purge, is supposed to be an army sent to destroy you if they target a large base they should show up with an “equally” large army.