since I completely missed season 4, I'd like to ask you guys if I make a new character, level it with the usual fast ways wlll it be similar to the mechanics/tricks I see in the fast season 5 leveling spreadsheet? What do I need to know since I skipped the whole season in order to catch up?
5) You can get a full set of armor quickly by doing the season journey (certain requirements).
6) Make sure to leverage the power of the cube and it's recipe's.
7) There are no new items being dropped into season, but that's how you get a new stash tab going forward (up to a max of 8). You'll get one more when the season starts (putting you at 6) but if you want that 7th one, then you'll need to do the season journey.
No the free set is not from patch 2.3. The new free set is a new reward starting with patch 2.4 in season only. (season 5)
It works like this. You complete certain steps of the seasons Journey and you get Hedrigs Gifts - The following as copied from the official site
"each step of the Season Journey will only reward one Haedrig’s Gift (for a total of three bags per Season/one full set of gear), regardless of how many characters you might play in a given Season. Make sure to claim these gifts on the character you want to receive their set!
The class sets offered in Season 5 are:
Barbarian: Might of the Earth
Crusader: Thorns of the Invoker
Demon Hunter: The Shadow’s Mantle
Monk: Monkey King’s Garb
Witch Doctor: Raiment of the Jade Harvester
Wizard: Firebird’s Finery"