Bedlam,
It looks as though there is nothing hidden here (ie I can see no justification for a cost of €9k in total - but this is my view only). Selecting a DC provider for 1 member can't cost that much, calculations as to contribution rates similarly. Looks even worse if the DC is already in place?
Some comments on the trail above:
1. The DC member may be suffering here - where the deficit is not made good
2. The DC member should argue for compensation in respect of the DB benefit he is losing (particularly as he is only 7 years from retirement).
3. The treatment of the four members looks uneven - 3 get pensions bought, 1 gets turfed into a DC scheme.
4. Where there is flexibility, the member should consider a PRSA (rather than an occupational pension scheme) as this will open up ARF options
I hope this helps - but I can't give comfort that this looks "fine". I think it may be quite the opposite based on my brief comments above (points 1 to 3).