I doubt you have 2" jets. Most spa jets are usually either 3/8" or 7/16". The jet nozzle is deep inside the pipe not near the surface.

But unfortunately, given you have such small pipe for the jets, that is most likely the cause of your weak jets. The EcoStar will help some but there is only so much you can do with that size of pipe. If you did have 7/16" jets, you might be able to replace them with 3/8" jets and the jet would feel a lot stronger.

But a bigger concern is with entrapment. With 2" pipe and such a big pump, you have the potential for some very serious entrapment issues. So if you do decide to go with a VS pump, please make sure you get the SVRS version of the pump.