No other class can sneak past enemy armies to directly damage their production, blow up fortifications, burn food, steal gold, and force other players to skip their turns.
It's a high risk, high reward class. Just because the costs are high does not mean that they get a free pass to skip the training phase.
The only valid reason to make their training phase easier would be if nobody was surviving long enough to be good at the class. I can tell from personal, painful experience that there are plenty of maxed-skill infiltrators running around, so that's not true.
Perhaps we should lower the training time, and lower the max effect? Infiltrators are glass canons as it is, but glass canons that take a very long and boring time to create. I think it might be more enjoyable for all if some rebalancing was done.
