What Schwalbe means is that leveling is now much easier to do, basically to lvl up you need X thousands of exp where X is lvl you are advancing to, so for lvl1 it's 1000, lvl2 is 2000 and so on. Achievements are worth ludicrous amount of exp and won match is worth 1000 so people can get really high lvl without knowing shit actually. Also previously with lvl12 cap the novice was up until lvl4 but now with lvl45 cap the novice is just lvl8, so people lvl up much faster and they go out of novice zone riddiculously faster and Devs don't see any problem with that.
Oh and despite that people still farm achievements, so ftw lvl25 engineer who doesn't know shit and buffs everything. Levels now mean even less than before so we judge people abilities (or just non-retardeness) based on number of matches they have played, because it's more accurate.