Correct buffer sizing isn't a good solution for Bufferbloat: The ideal size corresponds to the end-to-end bandwidth-delay product, but since one buffer can handle multiple flows with greatly varying latencies/delays, that number does not necessarily converge.
Queueing aware scheduling algorithms are much more effective, are readily available in Linux (tc_codel and others), and are slowly making their way into even consumer routers (or at least I hope).
Perhaps you know this already (not really clear on what your comment is saying), but Dave Taht is one of the authors of FQ-CoDel, which is what the author of CoDel recommends using when available.
