Well, not likely a breakthrough. As we are seeing in the Russian numbers taking territories incurs more losses than defending territory. Russia is still advancing though making no significant gains.
Even with the amazing combined arms Ukraine has moving from defensive positions to offensive ones you need to outnumber the now defenders. It’s going to be hard for Ukraine to have the numerical advantage in anything more that small specific pockets of the battlefield.
A big breakthrough just isn’t in the cards until there are 100’s of thousands of robots or a country steps up with troops to support Ukraine.