Discussing Rabadon's Deathcap

I've been reading a lot of post discussions that have commented how , or RD has fallen out of play in the last season or more. Arguments concerning high cost limiting it to late game play selection, adding to the fact that most high level play (and some mid to low) games are decided long before RD becomes feasible to buy, make other items like and more appealing.

Are there any arguments for reducing the cost, and stats? If we left the percent alone, and decreased the flat AP stat and cost to be more competitive with items like and and still be viable based on the percent AP increase, would that make RD more viable for selection? Another potential trade-off could be to drop the percent AP increase and scale down the cost appropriately. Any thoughts, ideas?