So breaking this down - VG for the majority will be a 10 gem feature. Boost your spells, heroes, barracks and now VG and attack endlessly for 2 hours without having to keep your phone on in between. That's basically all this is.
For the higher leagues - they basically get that same feature but for free.
players will want to play like this to benefit the most...
Get Attacked (get shield) > Attack 1 (-3 shield) > Attack 2 (-4 shield) > Attack 3 (no more shield) > short VG or gem VG and have a boost session once a day...
The big picture - Day 1 and 2 combined encourage casuals to attack multiple times before being hit again (this will be more of a QoL improvement for the hardcore as they already do this) and batteries around the globe can rejoice (or is it rejuice?) because we no longer have to keep our screens on all the time.

