@carhadras While some of the older players already have established spawners I do not feel that it is entirely an unfair advantage. The longer anyone plays on this server the more of an advantage they have. Also there are individuals such as cephid that have, in a way, leveled the playing field in terms of a rarer more useful item. Also at the moment everyone has the opportunity to buy vip+ in order to obtain similar items or they could team up with other players who have established spawners.
The problem is, new players will never be able to get that kind of advantage no matter how long they play.
It's not because of them being new, it's because it will never be available to them at all.
Removal of this feature will do a great impact to server's economy both in game and in real life. Many players purchase VIP+ to use the spawn eggs on a spawner, and to help the server. You should know that the most important factor in VIP+ sales is the former.
Also, I don't get the main idea of this. What is the problem that spawn eggs cause? Some of them are indeed too OP to be used by players on a spawner but as far as I know, eggs given by craftycrates are hand picked to make sure they are not too OP so that shouldn't be a problem at all. You mentioned lag but I also don't get how removal of this feature would reduce lag. Spawners will keep spawning mobs; zombie, shulker, bat, doesn't matter at all.