Higher tier price is too expensive, I doubt some people will buy those more expensive tokens, IMO people will give up buying expensive prices, unless they buy the cheapest ones.
My fear is they won't know. Ie. they will send 1 bitcoin on crowdsale launch expecting to be getting in at the $2 price, only to find out 7 tranches have been bought in 1 big order and now they are paying $9.55 per EQB instead of $2.
I wonder why so many people worry about the ICO. Remember that you are dealing with highly educated and seasoned individuals. These guys are not the average 15-year-old altcoin kids that struggle with remembering the difference between bits and bytes. You will likely not be able to send BTC without knowing what you are paying for.