Specific rooms now add specific Monster packs to the temple and Temple modifiers have been improved which results in more monster density, challenge and reward. Temple modifiers have been improved so that if your temple has more higher-tier rooms, then it's comparable to a good map. We have also performed a modernisation pass on room rewards so that they're competitive with newer leagues.
Many rooms now provide Temple-wide bonuses for the present-day Temple of Atzoatl based on their tier. The following rooms now grant +1% to monster pack size, 2% increased quantity of items found and 4% increased rarity of items found per room tier: Hatchery (please read Version_3.10.0#Incursion_Change for full list of rooms)
Based on the tier of the Hatchery sequence of rooms, monsters throughout the present-day temple will benefit from increased damage modifiers, in line with similar map modifiers (including the benefits to item rarity, quantity and monster pack size that those modifiers come with).