According to an internal document leaked to the press at least...
This is due to the dire financial state of the airline and the ongoing sage with the pilots union.
A couple the points discussed:
1. retiring some of the fleet earlier than planned, including one 744 and and four 737s.
2. Any future plans for new long haul aircraft will have to be adjusted/emended (not sure how that fits in with their plans for new aircraft as discussed in the other thread).
I assumes this also means we are unlikely to see any hard product improvements any time soon.
LY employees (especially the pilots) have criticised these plans, claiming they will hurt passengers as well as themselves, and see this as yet another stratigic move within the ongoing negotiations with the union.
http://www.themarker.com/news/aviation/1.2569258