If I may put my perspective on this as I vaguely looked at latest replies. I as a complete novice understood the code and made work around the things which were "hardcoded" in the plugin, in fact they weren't that hard coded, it was of course a lot of head scratching, trial and error, but there are ways to work around any problem you have, due to being that Tony's plugin is quite flexible although it doesn't seem so at the first glance.
Also on performance compared to old retro style where bunch of plugins were munched together, the crashes happen a lot less than it did then. Therefore the optimization is working well within the plugin. It is extremely difficult to catch and understand why the crashes happen, because it can be multiple reasons. Sometimes the maps themselves are badly optimized and are surpassing the data value, if I am not mistaken it was around 4k max. If you have it on old style, some maps which doesn't work with Tony's plugin might work, but some maps which worked, might not.
Lastly, but not least, if you give the right tools for Administrators to administrate the server with ease and efficiency, they have the time to enjoy the game themselves, productively and effectively follow the environment within the server and act quickly to any problems/misbehaving occurring whilst in the server.
These are my thoughts and only to be taken as thoughts and opinion which does not need and endless argument about. Think about it, if you disagree, you disagree I am perfectly fine with that.