Well I am not a fan of the Brussels gnomes and I may get flamed for saying this - I think it is a good idea. If there had never been pressure on car companies to produce more efficient economical cars we would still be driving around in straight 12 cyl cars of say 5 litre capacity. The same with vacuum cleaners. You could make them more efficient by having more powerful motors - think what a 10 KW vac could do on full power!
Unlimited power consumption of appliances means more power stations. I still don't see any new nuclear stations in Britain. Yes there are some planned by our friends (?) the Frenchies. So just where will the extra power come from for the ever increasing population of Europe and its never ending demand for electric?
There are a lot of good things that have come out of Brussels. Control of pesticides in our food being just one.
The point is that nowhere is there a manifesto pledge to reduce the power of vacuum cleaners.

Neither you, nor I , nor any of Europe's citizens, have any way of preventing a restriction like this. Yes, I am sure that more efficient vacuum cleaners can be made, but that is not the issue. Today, it's vacuum cleaners, tomorrow there could be a ban on motorcycles of more than 500cc, cars of more than 1.5 litres, TV screens of more than 50cm, computer PSUs of more than 200w.
If a UK political party issued these plans in a manifesto and if parliament was able to debate the issues, then one could claim a degree of democracy. But there is none.
IMHO, an unelected bureaucracy has no right to interfere in what we can buy or use.