I didn't have problem with performance at all on this pack, also I didn't notice any issues that could have been caused by decompilation.
I hope more well made interlude servers will come up soon. It is easy to make mid/pvp server on lucera, for sure easier on this source than on any open source pack.
You can continue to convince yourself of this. I'm sure your performance package is lower than the base for 2017.
I do not argue, you can take a decompiler and rewrite a bunch of crap code. But still it's stupid.
Deazer you correctly said. In any case, there will be consequences.