When starting out, I think it's a great idea to try different competitions. Especially if you *think* you are done goofing around with your system.
I don't think I will ever be done tweaking my system. That's one of the things I love about brewing is that it is never perfect and there is always room to grow and learn more.
I didn't mean completely finished, just had a good handle on what you do and want to see what else to change.
It doesn't do much good to submit and then completely change your system.
In my case, I learned about a step in my process that I didn't even know about and I was able to eliminate something in my beer that I never tasted before. And I learned what to look for.
I'm not confident that I can find a lot of the flaws yet, so I feel better having an "expert" taste my beer to tell me if it's good. Not necessarily to style or for awards, but for the feedback and comments. They can be handy as long as there is a consensus.