It is up to the PIC and or Company to address the issue by adding EXTRA fuel or by implementing strict rules for adequate airports via SOPs.
I don't think more fuel is going to help as that's not normally the problem - it's the time between usable alternates. I feel, eventually, the whole "adequate" airfield definition in EU-OPS will have to be dispensed with or altered to include weather. There's not much point in having information on somewhere but the forecast conditions preclude a successful approach and/or landing.
Over Russia/China in the winter, you could be really scraping the bottom of the barrel sometimes to get proper ETOPS alternates, should the 60min criteria be changed as above. Maybe EU operators are aware of this and are happier with the status quo...?