Shanks is a swordsman. He is ranked below Mihawk in terms of sword skills or strength. I had a very healthy discussion about this with Shishio.
I expect that Oda will give him one more badass moment, something like going toe to toe against G5 Luffy or even showing an even greater level of Haki. Or just going against Gorosei? Shanks and Dragon's character is similar to Nanami from JJK, that's why I like him.
But let's see whether Oda can conclude his character like Gege or not.