While I like that someone has invested some time and thought into it, I think what we are trying to (in case if we do try) is to fix a problem that doesn't exist.
New Logo? If someone come up with one, well and good.
New Tag Line? Again, the same.
Badges? Well, if we start using badges, we would need them for non-speakers as well ( like one that says "I am a virgin barcamper" for first timers and so on ). And btw, I think at a BarCamp everyone is a speaker, or at least should be. Using badges will only increase the gap between speakers and non-speakers.
The first time we ever had too many sessions was at BCK12, at Trivandrum and this time we had a 30 min time limit to tackle that. If we have too many sessions, lets keep a fair use limit, so that everyone gets a chance. But this should be without compromising the sense of an un-conference. If a sessions demands more time and the crowd is into it, there is no reason why it shouldn't exceed the limits. Thats why I used the word fair-use-limit instead of time limit.
Sharing of PPT and uploading to our slideshare account. We used to do that regularly. Point Noted.
And Self Promotions. I think its more about how you present it. Instead of presenting the product on itself, one can present a case study and some lessons / learnings that one encountered while developing the product or something. The way Kenney does it maybe :P . I think we should be worried not about the "Self Promotions" but only about the "Shameless Self Promotions". The latter is where they just advertise without providing value to the community. When you are up on the stage, the speaker is promoting himself / his product in one way or the other anyway.
I rest my case.