Of course not. The Junker plan involves federalising Europe anyways so what's left of our soverignty if any will soon disappear. All our laws are subject to EU regulation and must be compatible with the EU convention on human rights. Therefore as well as the EU directly passing UK laws or preventing laws being adopted it also indirectly controls the type of laws we pass as they have to undergo EU regulation. Also every so often EU member nations receive an economical report regarding the necessary actions a government must take. As a member you have to meet a certain set of demands in the report.
We control few major policies nowadays, and either way Europe is heading into a United States of Europe whereby there is an EU wide tax, EU wide currency, EU wide stock market, EU wide army, EU wide foreign aid policy, EU wide education reform, EU wide renationalisation, EU wide migration, EU wide healthcare system, EU wide foreign policy and so on. National governments will act more like governors do in America, the fact is all our sovereignty will eventually disappear anyway. It slowly has since the 70s, the next 40 years will see it be gone for good.
As our GDP growth is expected to result in our economy surpassing Germany in the near future, expect the UK to fund the greatest proportion of the project and receive less from it as a result. One can argue with the state of the EU we are better going it alone and re igniting our relationship with the emerging commonwealth nations than carrying the EU forward.
So just remember when you vote for Tories, liberals, Labour, greens and anyone but UKIP it all arrives at the same result, a full transfer of remaining powers to Brussels. The argument that lib/lab/con is practically the same thing could not be more true.