As for the EU Council presidency, it is rotated between member states every 6 months. The current presidency is held by The Netherlands. Guess who will hold the EU council presidency next year? The United Kingdom.
The nation with presidency does not do much more than organise and facilitate meetings. It's not a position that holds any influence. It is a chore more than anything else - that's why the term is only 6 months.
They do more than that. They set the agenda and focus collective efforts on certain topics.
I do not dispute that the EU should contain a degree of euroscepticism, which it currently does. There needs to be a balance, with two sides debating the case between bringing EU members closer together and also keeping certain aspects further apart for the good of the Union.
We are one of the most eurosceptic countries out there (hence our exclusion from the Euro, the Schengen Area and the many opt-outs we have regarding various matters). We will soon have a stronger voice than ever to help shape the EU and factor in the concerns of everyone who leans that way.
Like I said, even if we leave, we will still be heavily intertwined with the EU no matter what. The European countries are all our neighbours and largest trading partners by far in total, and all of them are in the EU or EEA.
I firmly believe it is in our best interests to stay within and, as one of the largest voices with one of the largest EU Parliament voting powers, lead the EU to help shape it.
To be truthfully honest - and this is only my opinion here - I think in the next decade we will see a EU-wide restriction on migration, with power put back to members to control the flow.
David Cameron negotiated certain welfare benefit changes imposed on EU migrants only, which would have been thought virtually impossible just a few years ago. When you factor that in with recent comments from the likes of Tusk, it shows that change and reform is coming.
Members of the EU do hold all the power overall. Certain heads of the EU might have certain agendas, but at the end of the day they cannot force them upon members because it's very easy for those members to leave. They will always be acutely aware of that.
To preserve the EU as it is, they simply have no choice but to keep everyone happy.