This replacement seem to be a waste of time from dev side.
The tank looks different enough from Ramka-99 and Termi 2017, in no lesser degree than T-series, Leo or Abrams series between clones placed on different tiers.
I prefer to keep Termi Prototype as it is. Purely for sentimental value.
The original Termi P was placed to underdog position by devs compared to better powerful Termi 2017. Everyone who got 2017 in hands, forgot about original Termi because there was no point to play less powerful Terminator, at least until recently when Prototype got slighly better AC compared Terminator 2017.