Been, in the last few months or so, essentially in a big dev push to try to wrap up 4.0's development and ship it out to you guys! I get that players are really interested more in the design side of things rather then implementation ( Why I didn't post here about the bug fixing stuff I did for 3.4's launch, even though that took like 100 hours to get done right.. )
Tension was a fun mechanic to code. It, in one way or another, was in design from all the way back in 2019. The relations between the NCR and BoS are a lot more dynamic then we usually do content in OWB - instead of just picking a 'Do we like them' focus path, you have decisions and effects that impact your country's tension towards breaking the cultural stalemate that's existed between your two groups!