It would be nice if the last tier (for example the 10 Oofa Fruit) would be colored in a different color if it's the final tier.. if not it would remain green. It can be blue or pink or any other color.. but only to multi tiers achievement, if it's one and it's obvious that it's the one and only tier so there's no need..
But I think we deserve to know which achievement got to it's final tier.. - which means no surprise tiers in the future, final is final for life!
I don't quite understand. If it's the final tier, it's just the last one? Unless you mean achievements that don't show additional tiers until you've unlocked the first one(s)? In which case I think your wording/explanation isn't conveying what you're intending it to.
Because there have pretty much always been, and probably always will be, tiers added to certain achievements. So I don't see them ever saying 'NO THIS IS THE END NO MORE TIERS' because someday, they might want to add tiers to achievements. And are probably going to do so.
Maybe an example of which achievement(s) you're talking about would help?
for example the wardrobe, if the 15k is the final one and they are sure that they will not add new tiers in the future, it would be nice to color it with a different color and just to let us know that we are done with this achievement.. if they think that they will probably will add, the color would remain green. of course you need to gain the last tier to see if it's the final or not..
THE FINAL (FRON)TIER
Eh, I'm not sure this is necessary or even particularly useful? I'd find it kind of weird if a bunch of my finished achievements were suddenly blue, and it would make adding tiers really awkward for staff.
Not that I want them to add tiers to things, because it's annoying as hell, but.
We'll never have wearable noses, or removable bases - (and the Skin Redemption)
We'll never sell boosters for CSC -
We'll never add a QS to Collection feature - QS to Collection Feature for GA
Things change and even though the site claims that they won't go hire, I'd rather they stay away from the word never.