Well, which resources should respawn on public multiplayer server, can be matter of long discussion, but stick and stones are the must. For example near water (due to erosion/rain streams/waves)
Cattails should sometimes also respawn, not only because they are important start resource, but they real counterpart is really invasive (wind spreads their fluffy seeds).
Or just add (more expensive) grass recipe for baskets.
Time in multiplayer servers is another topic. I remember some TFC servers with extended time (30 days per month, also decay and growth slower), but server was not stopping in absence of players. Thanks for such approach, one year in game was exactly 5 days (or something similar), thus it was reliable and easy to calculate: "today is spring, autumn will be Tuesday".