Odin is a prime example of a ship that has top tier stats in everything without being overpowered in any. The result is the ship being strong all-round and having no weakness. While that's great for the Odin players, it's not great for everyone else. Turn rate is getting nerfed to tune down its dueling potency. It'll undoubtedly still be a great groupfighting ship.
The idea of the change is fine, the Odin was too good in far too many things without enough disadvantages, but I think you've missed the mark of what it should be getting reductions in, which is certainly not turn-rate. The Odin is a visibly sleek ship and as such should have its hull cut down to perhaps the Falchion's amount, or honestly within the range of 10,900 and 11,000, and see its core reduced to 1160 recharge, that way, it's forced to be played with the same niche that it's always had. Sliding.
It's very absurd to see an agile looking ship being slower than some 7 gun VHFs with more core and armour, though the argument of shape can be used, I think shape becomes less of a factor if your opponent has an easier time working his way around you because you physically cannot play the ship the way it was designed to be used. As it currently is, it has to be flown like the Sabre, though it actually can't be flown like the sabre because it's somewhat slower and lacks the 7th gun.
I fail to see how making heavier 7 gun VHFs faster and making lighter 6 gun VHFs slower does. That just defies the logic behind their roles. Especially if we reflect on the Nepthys which has been historically comparable to the Avenger but with a 7th gun.
This isn't a rant about "oh noes, Odin trash now, Lich and Sabre OP." It's a logical explanation that highlights an oversight in the rebalance, while highlighting other areas of the ship where tuning would make more sense. More fragility to match its appearance and less of a core recharge rate make sense when the ship and all the lore behind it are taken into consideration, it's a ship built with a keen focus on high engine performance.