Most aftermarket ignition sysyems do include a coil that operates on continuous 12 volts so deleting a ballast resistor, tying blue and brown wires together is typical.
In any case, Before ballast resistor should be close to battery voltage. To delete ballast resistor wouldn't effect this. If you have only 10 volts coming to the engine harness on brown and/or blue wires,,, Ignition switch, bulkhead connections, etc.., can be the point or points of voltage drop. Low voltage might explain why the previous ignition system didn't perform well. Good luck with it.
