More Tiles for Five or More Players

Current Tiles:
2 Squirrel
2 Rabbit
2 Deer
2 Boar (deadly)
2 Wolf (deadly)
2 Bear (deadly)
4 Nuts (values: 1,2,2,2)
4 Herbs (values: 1,2,2,2)
4 Berries (values: 1,2,2,2)

24 Tiles, 12 Plants, 12 Animals, and half of those animals are deadly. Now, to add more tiles and maintain this balance...

More Tiles:

3 Squirrel

3 Rabbit

3 Deer

3 Boar (deadly)

3 Wolf (deadly)

3 Bear (deadly)

6 Nuts (values: 1,1,2,2,2,2)

6 Herbs (values: 1,1,2,2,2,2)

6 Berries (values: 1,1,2,2,2,2)

36 Tiles, 18 Plants, 18 Animals. OK, cool, it's not that hard to keep the numbers balanced and scale up to a slightly longer game.

The next question is, do I want to make it longer? One of the important goals of this game design has been to keep the game short. I think games with lots of randomness (in this case tile drawing and dice rolling), either need to be really short, so if you're losing it doesn't drag on, or really long so that the probability has time to even itself out. If the game is currently 30-45 minutes long, increasing the tile count by half would take it from 40 to 60 minutes. Does this game work as an hour long game?