Just wondering why you don't develop a new algo..you seem to have a handle on what is needed..its people like you that are needed to move this forward..
I'll take this as a straight question, not a rhetorical question. The answer is three fold:
1) due to other commitments I have not enough time to get seriously involved in such a project. At the same time I don't want to get tangled in some abandonware crapcoin, even if just part-time.
2) it is my observation that the publicly stated goals of majority cryptocoin projects are very different from the personal goals of the authors. It is a conflict of interest minefield.
3) the whole market of floating-point developers and users is deeply split in their understanding what does it mean to have "reproducible results":
3a) some want that their simulations differ very little or not at all. I'm more in this group and that is the approach to be included in cryptocurrency.
3b) others focus on the reproducibility of the end results, e.g. the launched missiles hit the evading targets or the cell phones keep the connection when driving in or out of the tunnel. Those people would laugh at trying to incorporate floating-point calculations in the PoW code.
None of the above two camps have monopoly on being good or bad, right or wrong. If you (or some other reader) is interested about the above split it is worthwhile to study how the Java language introduced the keyword
strictfp.
Intel is definitely serving camp 3a). Nvidia is started in 3b). AMD started in 3a) but shifted into center after acquisition of ATI from 3b). FPGA vendors try to serve both camps, but have way more success stories in 3b).