What do you want to know? Any proposed new stadium wouldn't have impacted negotiations in the slightest. I would have thought anyone with a modicum of common sense would have worked out that if SISU had become owners of ACL / Ricoh any plays for a new stadium, if they even exist, would be scrapped.
I haven't said CCC should have negotiated with SISU. I have said one of two things should have happened. Either, and this I think was the best option, ACL gets put on the market and any interested party gets a chance to bid or, as an absolute minimum, the club gets the chance to match any agreed sale.
You could easily flip your argument and ask how SISU could negotiate with CCC when CCC are to be charitable, being less than honest about the performance of ACL. Think of what was being discussed prior to the sale to Wasps. SISU were being expected to bid in the region of £10m for Higgs share, anything less was ripping off a charity, and a similar amount for CCC's share plus clearing the loan as they couldn't be trusted to repay it. You know as well as I do that if SISU had bid £5m and asked for a 250 year lease in return they would have been torn apart on this forum and elsewhere.