Few days ago, I flied 10seats Y for the very first time from FRA to HKG (11.5 hours day flight).
Y was completely full but I found it tolerant, mostly due to my exit seat 59C.
The new seat and monitor were both great.
The major issues were longer queue for lavatory and less storage space(more people sharing same bins)
When passengers holding OW elite status, who can pre-select exit seats free and priority boarding to place their hand-carry, this new 10seats is fine.