https://www.warhammer-community.com/en-gb/articles/euo6nxbn/tokens-skills-and-roster-changes-whats-new-in-blood-bowl/
Team Roster Changes
Perhaps the biggest change in this new edition is that all of the rosters have been looked at, tweaked and changed to provide a new and exciting challenge for coaches. The first thing to note is that the number of positionals on a roster will now match what is in the team box, meaning you should never have to buy a second box just to get more Blitzers/Runners etc.
There are a couple of exceptions to this. Positionals that were entirely separate from the contents of the team box, such as Goblin Secret Weapons, Dark Elf Assassins, Bull Centaurs and most Big Guys, will remain untouched as they don’t require you to buy a second team box and have a load of redundant models. Additionally, the Ogre team will still allow 0-6 Ogres (0-5 normal, 0-1 Runt Punter), as otherwise the team simply wouldn’t function – plus you can still get additional Ogres separately.
Whilst this will mean that a number of rosters will lose a number of their better players, what we have done is rebalance a number of positionals with improved stats or Skills across the board to account for this. Here are some examples to showcase this:
A Skaven team can now take two Gutter Runners, but their Blitzers have now gained MA 8 and Strip Ball.
Dark Elves can now take two Blitzers, but their Runners gained Punt and their Assassins gained Hit and Run (which now works with Stab!).
Shambling Undead can now take two Ghouls, but these gained Regeneration, and their Zombies gained Eye Gouge.