An off-line transaction platform would help with these current issues.
An off-line transaction plattform? How exactly should this work? I imagine you walking thousands of kilometers around the world to deliver my 5$ to ling long lee in china.
I guess you probably meaned off-chain transactions? Like the lightning network with its side channels, which may come in the future.
Unfortunately its not implementable yet.
But you can look at the speed and fees that others such as Ethereum are charging.
Ethereum does not charge fees. Fees are depending on the amount of tansactions waiting to get confirmed. Bitcoin isn't charging a fees either.