I don't think ramp is the problem. All colors can ramp via artifacts. Draw (or card advantage) is the problem. Ramp gets key cards out early but loses value on subsequent turns as you miss land drops due to lack of draw.
If not for
Land Tax and
Enlightened Tutor (to fetch
Land Tax) to set up land drops, I don't know if I'd run 1-mana ramp in a mono-white deck. And it's currently about $70 for that pair of cards. Add in
Tithe and
Sensei's Divining Top to further stabilize land drops and we're up to $170 just for the beginnings of a decent package that allows white to use ramp effectively.
WotC should either print good draw effects for white or reprint those mentioned staples into the ground (removing
Tithe from the Reserved List).
Or give us actually good new cards - something like a sorcery for two white mana that pulls three basic
plains to hand (unconditionally, without the usual "you're behind" clause). Not ramp, but it'd be solid card advantage and set up land drops.
How about white being the color of efficiently bringing lands to hand but having to play them fairly, one per turn? That'd satisfy me well enough.
Re: tokens - Green is the king of tokens, I think. Multiple doubling effects (compared to one in white) and many good token generators. And Izzet is actually pretty good at it, too - Brudiclad, Locust God, dragon tokens, copy effects, etc. White has some nice effects -
Crested Sunmare,
Resplendent Angel, etc - but I don't think it's strong enough to be the clear choice for token strategies unless we're talking Selesnya.
Of course, if white gets a token tripling enchantment as part of the possible cycle began with
[[Nyxbloom Ancient]] and
[[Fiery Emancipation]]... That could change things, provided it's actually playable and doesn't cost 7+ mana to cast.
But I find that pretty unlikely. Remember the 6-mana mythic cycle exclusive to Game Night 2019? Except the white card was 7-mana, because... "screw you, that's why" apparently.
https://scryfall.com/sets/gn2