You should try to express your enthusiasm and ingenuity by doing research at night, not by overriding your system during the day.
Overriding is something you should do only in unexpected circumstances – and then only with great forethought. If you find yourself overriding routinely, it’s a sure sign that there’s something that you want in the system that hasn’t been included.
You can be creative in research but don’t trade creatively; in other words, stick to your systems.
If your trading system is inadequate, you shouldn’t use it. If your system is good, then stick to it faithfully.
In the meantime search vigorously for improvement. When the new system is ready you can change to it – you are not thereby failing to stick to your system. So there need be no conflict between persistence and change.