As the cards rotate out of Standard, they are put into binders or a particular set or block, depending on the size of the collection
Unless that creature has shroud or hexproof, Swords will almost certainly deal with the problem
Temur Roar is just a very well-rounded deck that isnt trying to juggle two disparate themes at once
You begin the game with the Vanguard card of your choice, then your starting life will increase (or decrease to balance very strong abilities) and your starting hand size may increase or decrease as well
Also, some of the better draw spells are available on 4 mana (Greater Good, Fact or Fiction effects, Concentrate effects)
But all colors of Magic can mess with the stack somehow and prevent effects from happening