I don't think 99% of people across Europe know or care who these two candidates are or what they are contesting and I seriously doubt it made any difference to how people voted recently. Of course though there is still support for the EU but there are countries that are deeply sceptical and even anti-EU, Britain being a prime example but the Scandinavian countries also (there's a reason why neither Denmark nor Sweden are in the Euro). It's these countries that will use the tag of 'federalism' as a stick to beat the pro-EU lobby with because they know it goes down well with their target audience.
If either ultra-federalist go on to lead the EU and proceed with a federalist agenda then it's inconceivable that this will help persuade floating voters in the Euro-sceptic countries. And if Britain votes to leave the EU then it's very likely that Sweden and Denmark would follow suit with a referendum and the distinct possibility that they would leave also. And then there's Greece. The people there are barely containing their anger at the austerity measure imposed by Merkel. I do wonder if they had a referendum how it would go. If Britain leaves the EU it could cause a domino effect and your European dream could be over.
You might not be unduly worried. Francois Hollande is.
But this is the way it has been going, quite overtly, for some time now; "ever closer union" is the phrase I believe. Federalism will not come as as suprise to most people as it is no secret....which is what your post seems to imply?
And I have discussed Greece with you before; the country has repeatedly voted in a government which is pro the EU bail out. I am not suggesting there is no opposition; more that the opposition is loud but not significant.
The way I see it is that the EU has gone through it's most serious challenge in the past 5 years with the back drop of the recession and it is coming out of the otherside now still reasonably intact and even closer in some terms. There are a lot of 'ifs' in your reply; time will tell but I see no evidence to significantly worry me at present.