Pumping on Mishras Bauble and not just instants and sorceries is a big deal, too, and plotting will also come up in Modern some of the time just to tax your opponents mana more when you expect that they have a Fatal Push or Lightning Bolt at the ready
however, the key difference is that the Toy Workshop says you can only spend this mana to cast spells or activate abilities that put tokens on the battlefield
Into the Inklands sports even more characters from Disneys animated portfolio (I got decks headlined by Scrooge McDuck and the 101 Dalmations)
That helped somewhat, but White mana needed true powerhouse cards at a low mana cost to get more card draw
Like the previously mentioned decks, some upgrades and swaps would really help Swell the Host be more consistent and powerful
When the delayed trigger resolves, the player is instructed to exile only the token or tokens that were created through Flamerush Riders effect