It'd be a fundamentally different design. Right now it's optimized for, well, making sure he can
survive being attacked or ambushed. It's not optimized for making him into a deplorable combat asset. We could do that if we are willing to give up on sealing, but the sad truth of the matter is that we'd still never have a strong a build as Akane. IMO, it's much better to focus on sealing (which we need to stop the Great Seal collapse) and making sure we won't be utterly fucked the second an enemy jōnin pays attention to us.
Side note,
@Paperclipped, could you possibly explain what a first round of combat looks like with the skills we chose to raise for the
Survivable Sealmaster build? I think it'll be pretty helpful for showing what it's designed to accomplish and why we chose the specific skills we did.