You are paying for the right to access a specific set of frequencies and use a transceiver with an output greater than 0.5w. Those frequencies are not specific or exclusive to you and are shared with many other mostly professional users, so there is a huge potential for crossing over with legitimate professional radio users, such as shopping centres, hospitals, security, taxi firms etc.
In my opinion and specifically for airsoft, they offer no more benefit than the standard PMR446 channels, just you may legally use a higher power output.
PMR offer you a defined standard set of channels than everyone can simply access with very cheap equipment, and the reality is that at airsoft ranges, you are rarely going to be sprawling huge distances that 0.5w become ineffective, even in dense woodland.
If you do find yourself outranging .5w its likely to be at a big organised event, where the chances are the requirement for a wider radio net, will already be handle by someone who legitimately knows what they are doing.
The more complex you make it, the more chance you have of pissing people off. Unintentionally dropping in on a command level channel to tell your teammates there is a sniper in a tree, is not good drills.
From what you have said you need, I would recommend a simple cheap PMR446 set
(Clicky) If you do eventually find yourself needing access to more bespoke frequencies a UV5r will do everything you need and a lot more.
Always remember the KISS principle, (google it)