Tiered nodes in Story Events aka 'PVE'

Oldboy

I'm on my lunch break so i'll just cut to the chase

In order to make roster development more relevant, how about tier-ing the nodes?

Currently,
3 Easy nodes
3 difficult nodes
3 essential nodes
I'll ignore the loaner nodes and one-off nodes

Suggested,
3 nodes - players can only use 1 and 2* characters. This includes one 2* essntial node.
3 nodes - players can use 1,2,3* characters only. This includes one 3* essential node
3 nodes - players can use all characters. Includes the 4* essential node.

Each set of 3 to have
1 Trivial,
1 normal,
1 difficult node

Or set all the 3 trivial nodes in the 1-2* set of 3.

This helps to improve gameplay as
- all tiers are used in PVE other than just 1 character of that tier
- people dont jump development of their roster by just using 5* and 4* in PvE and ignore the rest
- makes 3* relevant again
- roster development is more crucial to winning or placing well in PvE
Edit : - makes it more interesting?
Edit 2: - scaling levels of opponents become more do-able for the 2* and 3* tier since the 5* are locked out of this tier. Players with high level 5* aren't 'forced' to use only their 5* in order to play the Story Event

Obviously people could just develop a few characters of each tier to overcome this problem but they may get stuck in Heroic and Simulator events where there is a greater variety of opponents.
Perhaps Placement rewards may have to be adjusted.
Scaling will have to be adjusted to take into account the levels of the lower tiers.