I don’t mind different Jedi having different swordplay styles. I do mind the rigid Form I, Form II, etc. brouhaha, though, and the Jedi-centric portrayal of it all.
If it makes you feel better a decent percentage of Force sensitives make minor tweaks to their specialized form and even use multiple forms but the beings who do this are adept-master Force Wielders.
And if that doesn’t work for ya, just remember that this isn’t real and it can work however you want it to! Fun!
JEDIT: That could be construed as a jab, but it’s not.