I would say get rid of mini-mac, but since i have never seen a contest, I guess that it is a non-issue.
I do know however, that the planes being brought to the contests these days are mind boggling. I fly a 25% scale Sig Cap, powered by a Moki 1.35. It has Digital servos all around, and well over $100 dollars in hardware. The plane cost about $1200 total. Now I am very good at rolling circles, and With a 17X6 prop I can hover at 1/2 throttle, and I can do every 3-d manuver that I have read about. I have flown in Pattern, Imac, and scale for the last five years, and burn over 30 gallons of fuel per year. Now, if you think I could compete against 40% stuff that I faced in the Advanced class last year you are mistaken. I would almost like to see a restriction put on this thing like we see in pattern- a weight limit or something.