While I think it will be a little slower than you think from here on out, the bigger question remains, "to what end?" Sanctions are not an end in themselves - that's a bit of a western/american mindset. Usually, the point of sanctions is to (i) create popular suffering so as to undermine domestic political support, resulting in regime change, (ii) create popular suffering so as to undermine domestic political support resulting in policy change, or (iii) to erode the capacity to make war (eg, by limiting raw materials, etc.).
My point is that the Russian system is not going to have a problem handling either (i) or (ii), since popular support (or even oligarchical support) is not the underpinning of the regime or policy. That leaves us with (iii), which will occur, but in a command/authoritarian economy, unfortunately slower than we might hope.