To start with, I like the basic structure of this proposal. While I do like the CS conference system, I have to admit that the pan-TCS conferences are becoming less useful as the field widens, and, nostalgia aside, innovation is needed to maintain a general TCS scientific community. The proposed new structure seems to me to indeed fit well with the rest of the TCS ecosystem (journals+FOCS+specialized confs+arxiv+...) I do think that a name-change may be in place, reflecting the new format though. (Maybe something like CTOC, pronounced just like STOC but with the C standing for conference/congress/confederated?) My main problem with the new format is that, as detailed now, it does not seem useful enough -- why would I come or send a student there? Going to STOC/FOCS now has a double benefit: both for the speakers (they are indeed listened to and they get significant credit) and the listeners (the talks are good). These two advantages will be gone with the new format. I am afraid that the weakly stated "few plenary speakers" and "tutorials" are a step in the right direction but too weak to be a real attraction. I think that significant new attractions are required to make this "fly": Either a strong program of invited talks (like in the Congresses of Math or of game theory -- but this may be expensive since these speakers may require funding) or, my preferred route, a "federated"-spirit having may specific workshops and specialized conferences either as part of the new STOC or as satellites (as is starting to happen around EC for example). Finally, if a major change will happen, I wouldn't miss the change of putting in other innovations as well: from videotaping and distributing the talks (at least invited ones), to encouraging preprints-on-arXiv, etc.