The only problem with the Batino route is that it takes you straight to Tagaytay Highlands and you cannot pass through unless you are a member
The future Nuvali route takes you to the public road before the Palace in the Sky with less (I assume) residences and businesses along the way compared to the Sta Rosa route. The Alveo people confirmed that the road going to Tagaytay from Nuvali is being cemented and widened. I have not verified this personally though.
As for the Tagaytay rotunda traffic, whether you take Sta Rosa, Aguinaldo Highway or the future Nuvali route, it will still be there
