If the game will keep ILV then our devs should use that in the correct way like FF14-WoW do.

ILV119 to ILV129 Example.

ILV119

50 HP, 50 MP, 30 STR, 30 DEX, 20 AGI.
Accuracy/Attack + 15
Double Attack + 2%

ILV129

100 HP, 100 MP, 60 STR, 60 DEX, 40 AGI
Accuracy/Attack +30
Double Attack + 4%

Every 1 Year make a Jump in ILV to give us time of Grind this New items.
R/M/E/A 350 Plutons Upgrade Max To keep them Relevant
Some Battles can keep a max ILV to keep those battles relevant.
Reforge AF, Relic and Empy Should Have Updates every year too to keep them relevant.

Ambuscade Cap ILV119 - Max ILV129 even if the game keep advancing and we have ILV140+.

But having us stucked on ILV119 its Silly.