Good implications for Battle of Britain etc. At $10 it would basically take hits from 3 tactical or 2 strategic bombers to destroy a base (after AA). The best part is it could kill some very gamey phoney baloney moves involving gratuitous bases. For example:
J1 Japan takes Chahar
J2 Japan builds airbase in Chahar and lands bombers there
UK2 UK pacific bombs Chahar airbase
USSR3 Russia bombs it a second time, destroying it
J3 no Japanese SBR of Moscow