> and this veto thing is really crippling the EUs ability to act.

That's the point of it. As it is, there's no reasonable assurance that acts approved by the majority won't sacrifice some of the existential interests of members deemed expendable - "for the greater good". We all know that there's no connection between what politicians promise and what they do - until that changes, having the ability to cripple their actions will continue to be indispensable.

> What is tariffs affect one country more than the others, should it be allowed to veto a tariff decision?

I don't know if individual EU members are allowed to impose additional, national tariffs on non-EU products but why not - a lot of issues can be resolved by giving members more freedom and more say in decision making rather than more coercion.

> What if a majority wants to alter the deal?

They can alter it only for themselves in the way I described above.

It's disingenuous to call the EU dysfunctional and blame that dysfunction on lack of coercive powers. Maybe the EU is functional exactly as much as its levels of development and integration allow, maybe pushing for more creates unacceptable political risks, there's a lot to consider here looking at the excessively bloody and inadequately smart history of Europe - it was a power keg and it still is. Removing veto power won't make it better, it can actually make it go off again, risk is what really tips the scales here.