Should CDR Sivir be used more at the pro level?
I'm of the opinion that going 40% CDR on Sivir (via items like Lucidity Boots, Essence Reaver, Youmuu's Ghostblade) is a better fit for her than going standard ADC. Sure, an Infinity Edge is mandatory on all ADCs (except Vayne), but since Sivir has such bad AS scaling and does more of her damage with her Q and W (which are CDR-centric), it feels like Sivir would do more good with Lucidity Boots and Essence Reaver than Berserker's and Bloodthirster.
To put it in perspective, 40% CDR on Sivir lets her ult every 48 seconds. That is a TON of mobility for split-pushing, engages/disengages, objective control, etc. Add on how frequently she's able to use Spell Shield and Boomerang Blade, and you can see plenty of neat advantages over your typical auto-attack spamming builds.
But whenever I see Sivir in pro games, nope. They stick to the standard ADC builds when Sivir is out-performed in them by other ADCs (i.e. Lucian, Tristana). Kinda disappointing.
My 2 cents.