Come on, is your quality standard really that low? In the second example, the slabs may be level again in terms of height, but the path is so uneven that people will surely fall flat on their faces. The slabs could certainly be lifted manually, the subsoil re-leveled, and the slabs realigned. That would be a good job, not all this magic for a result that is still not satisfactory. For large slabs that cannot be removed, this might be a solution, but in this case, it's pure botch, sorry.
Come on, is your quality standard really that low? In the second example, the slabs may be level again in terms of height, but the path is so uneven that people will surely fall flat on their faces. The slabs could certainly be lifted manually, the subsoil re-leveled, and the slabs realigned. That would be a good job, not all this magic for a result that is still not satisfactory. For large slabs that cannot be removed, this might be a solution, but in this case, it's pure botch, sorry.