Indeed. Eventually when the trilogy is packaged as one game, this won´t be much of an issue (particularly for players who jump in now and will play the whole trilogy for the first time). But with six locations per season, you tend to automatically expect them to be huge/filled with content so they last you long enough (regardless of whether you play the non-campaign modes as well or not). With H3 it´s perhaps a bit more “sensitive” because so far there have been no indications of DLC content (unlike H1 and H2) and, as you say, it´s the last one for a while.