Creating Food tokens for free just for doing what youd be doing anyway is just fine
Yes, creature tokens, including populated copies, enter the battlefield, so any cards that care about creatures/creature tokens entering the field would trigger with populate
you can spend less mana to get a quick snipe of damage early from Red Tiger Mechan, or try and multi spell with Memorial Team Leader to keep applying pressure
Old-bordered foils are especially impressive, since that particular look instantly connotes age and scarcity
When you do surveil with Dream Eater you can bounce a nonland card back to an opponent's hand, getting rid of any pesky permanents they might have in play
Enchanted cards alternate art cards with a special finish and design, but the same mechanics as a lower-rarity card