Well, IIRC, an UEF tmd needs 2 shots to take a missile down with 1 tmd and 1 missile, the missile is always near its objective when it explodes. While sera and cybran just one shoot it at full range. So again, if i remember correctly, the effectiveness difference between UEF and sera/cybran is huge. Aeon is good and bad at the same time, but i agree range should really be higher.
The main problem with the 2 is you cant really defend against a missile spam. UEF can make rows of TMDs tough, which will help to get the 2 shots.