I can answer for myself & my ILO mod explicitly & likely for the rest as well.  We won't know what's going to be in 1.3 & how the changes will affect our stuff until it becomes available.  As a result, there is no way for me/us to say if our mods will need updates to work with 1.3 or not  and what extent it might require updating if it does.  

As ever, I'll be working to reconcile my mod for 1.3 when it arrives as quickly as possible and will have it working probably within about 24 hours. I'll then have a 'proper' release taking advantage of the new features by the end of that week. But there's at least 2 weeks until then, which is surely enough to finish up another game.

I'm not sure if Vid is still playing He certainly seems to have been very quiet lately if he is.