A short story from a "newbie" not too long ago...
I use the big "pill" ball only because it doesn't fall apart like the current Miggle one's. I have seen older, I guess, Miggle or Tudor balls that are really good. Had one given to me by Geno and he agreed, mine were not good. So if I could get the smaller balls that don't quickly become navel lint, I'd use em...
Now, on the TDQ vs TTQB debate, I'll share the opinion of someone who's "at it" a little over 1 1/2 in a lot of league play down south (me), and of course just my opinion as stated.
When I started, I had never thrown a TTQB pass as I used dice as a kid playin solitaire and it had been 30 years since I saw EF. Having the horrible felt footballs and a 1969 TTQB I had a hard time just getting the ball to come off the arm.
I did not want to use the sticks in league play, as I wanted more control of the outcome. I heard about the TDQ, got one, and I was at least able to get the ball in the air and a chance for a completion or interception...I still did not pass well until I practiced and was helped w/ball placement, angle etc from Geno @Miggle last year. I am still no where near the level of throwing as the guys in my league who throw with a TTQB. Point being, you still have to practice.
I can now pass just as good or bad

with a TTQB and use it for my "leaning" throws. The trick is, if you have to use the TTQB it is best to have an old one...(not sure of timeline)...I had both Joel and Geno check the old ones I had and they said they were, ah, OK.
So, bottomline, I think, if you are going to ban certain "stuff", perhaps you can help a new guy get the same "stuff" you are using and maybe spend 15-30 minutes filling them in on some basic tips for throwing if you want them to stay. After that, it's up to them to practice a bit or a lot depending on there schedule.
For me, as I only had 3 weeks when I started to build a team, learn how to tweak, rules, pass, strategy, etc. etc, the TDQ helped keep me interested.
Now, it doesn't matter, I'll play any weight, any style, any rules as long as the rules are the
same for all. I am equally as bad in any ruleset as the only constant is ME as the coach

I certainly don't mind winning, but hangin w/friends, meeting new friends, laughing, etc. is really what I look forward to.