While I understand that bringing in new players isn't necessarily a goal of Homecoming, the removal of Training Enhancements makes it harder to teach brand new players how the game works.
The big problem with having DOs drop from level 1 is that Enhancements don't make any sense to a new player, so gaining an Enhancement that you 1) can't use and 2) don't understand is off-putting for new players.
Training Enhancements clearly tell you what they do. For example, if you're playing a Tanker and a TO: Hold drops, you can quickly figure out that it's not helpful for you specifically. Now, I understand most of the current player base has years of experience with the system and can what a DO, SO, or IO is just from the border and color, but we also had the luxury of learning how Enhancements work from TOs.
At the very least, if TOs aren't going to be drops, then put them back in shops with the Superpowered Trainers. Yeah, DOs are much more powerful, but that doesn't matter when you can't afford to buy them.