There is most likely no need to do incremental changes. There are already pretty good looking suggestions on how we can simply let miners decide the block size. To do that we would need some fairly strict rules for how long validating blocks by regular nodes can take until they are rejected. This would create a cap for the block size that is actually relative to the processing power of most full nodes. That is something we want, I think.

The other interesting suggestion was linking mining difficulty and the block size. Those are the two decent suggestions so far. Finding a long term way to fix this is much better than simply making a one time increase. If there is a one time increase, it should be a massive increase together with a smaller soft limit, so that the soft limit can be raised more easily in the future if necessary.