Tariffs, nice to have when exporting, can be a pain not to have when trying to make a level playing field for your own industries when importing.
Sovereignty, we don't actually answer to anyone, but we agree with some international organisations who don't try to take us over. Agreement isn't a loss of sovereignty, it's cooperation.
Our world standing, as part of the EU it would be near zero as we would have little independent say, our influence would be commandeered by the EU: but outside whatever influence we have it will be ours, not simply added to EU policies we may not even agree with. Yeah, right, no influence and few friends. As if.
Economies go up and down all the time. Renegotiation happens all the time of else nothing would improve.
Workers rights are not particularly protected when free movement of labour allows national expectations to be undercut by importing in outside labour. Nothing the EU has passed is anything the UK couldn't opt to do if it wished.
I suspect the queen may have not have been able to receive many valid replies.