OK, have fun with that; just thought ot was funny that a "simplified" 5E would involve increasing complexity needlessly.
You do realize 6 is more than 3 though, don't you? 5e has 6 saves. Each save is based on an ability check, but can be very different from one. Sometimes you have abilities that modify only Ability checks. Sometimes you have ones that modify only saving throws. Sometimes you have ones that modify both. There will never be a character who's ability check bonus is the exact same as all his saving throw bonuses though (because all PCs have proficiency with two saves). At the very best, the claim that 6 saving throws is smaller than 3 is willful ignorance of many 5e mechanics.