The amount of detail everywhere with Baron looks incredible, and the coaster itself is starting to come to life!
Simba - Coaster Zone Administrator Most rides on Icon (BPB): 32 (8/10/18) Most rides on The Swarm (TP): 86 (24/08/2015) Wicker Man - Coaster Ride Count: 2019 (0) Previous End Of Season Total Ride Counts On Wicker Man: 2018 (46) Wicker Man - Grand Total Coaster Ride Count (46)
That does look very stunning, I see what you mean by the holding drop, but I think B&M have probably thought out a system for how it would work otherwise wouldn't they be taking a bit of a risk with just the one chain? - The alternative aspect is might it not have the holding drop and just stop horizontally at the top of the lift, this I doubt but it's just an alternative thought though.
That looks absolutely stunning! Flows so well and in a way has a very similar start to Swarm with the Dive loop/Immelman going straight into the zero-g!
To answer the question about the holding break, it is most likely that the chain takes the cart to the holding brake where the car would swap onto a separate chain which will then hold the car in place. This would be done in a similar way to when there has to be 2 separate chains on a lift-hill where the car swaps chains almost immediately. There could also be a short crossover period with the car on both chains.