It would be nice to be able to rename a stadium so it could be named after an iconic player/staff member or sponsor at a future date if required

I wait for this option since years already since this hapens in real life quite a lot.

 

Especially in Germany clubs tend to rename their stadium every few years when the sponsor changes.
Example here in Hamburg.
Volksparkstadion (1953-2001)
AOL Arena (2001- 2007)
HSH Nordbank Arena (2007 - 2010)

Imtech Arena (2010 - 2015)
Volksparkstadion (since 2015 cause the current sponsor is not only a sponsor but a supporter of the club since many many years)