Sure, absolutely @timk11. So the high-level plan as described in the first post of the thread is that DFINITY adds 28 more nodes, without getting any rewards for them, as described in this recently adopted motion proposal and discussed and supported by the community in the forum thread.
DFINITY already had some Gen1 nodes in Seattle, in a DC that was built with a regular IC usage in mind but was not actually used for the Mainnet since there was no need for more nodes. So these nodes were used for (internal) testnets and testing.
Platform operations and a few other engineering teams are now actively working on moving these services out of the Seattle DC (se1) so that these servers and this DC are fully free and will be fully dedicated to the IC Mainnet.
The next steps will be to submit a proposal for adding a node operator record with allowance of 28 nodes in this DC (without rewards of course). And after that we can onboard nodes and let them join the Mainnet.
I hope this helps. Let me know if you had any additional/particular questions Tim.
Regarding decentralization, I believe this will be an improvement since we (DFINITY) will have DCs also in US, so not only in EU.