The fees are very low, especially with LTM. I don't think that any user would be angered by them. The comittee would have the power to basically disable them, but why?

The fees are actually the economic model of the DEX. Do you have an idea of how the DEX would finance itself on EOS?
One option: it is run by a central authority (like BitFinex) that is pumping money in it until market share is established, then introducing some kind of economic model. The central autority either then stays or leaves the exchange to itself. Probably works, but is it then a decentralized exchange? Not. Future of it? Questionable.

The people doing the workers are more than volunteers, some of them are fulltime engaged with BitShares. I dont think that Inflation is not possible without a real hardfork.

Additionally, there are other problems that might occur in EOS, see https://www.reddit.com/r/BitShares/comments/7w5yfa/noob_question_about_holding/

I do also like EOS and look forward to its live product. I am also curios what the model of EOSfinex will be! If you ask me it all comes down to marketing and an intuitive exchange, sadly not the underlying technology (see VHS vs. Video 2000, Blu ray vs HD DVD and so on).