Still suggest upgrading?

[markush]

After spending many years with room acoustic treatments and Digital Room Correction I would recommend to use easy to integrate elements like a carpet etc to decrease reverberation time.
Definitely try to focus on a proper speaker setup. And then use Focus Fidelity Designer software which is a very easy step by step tool anyone can do. Convolution filters can be included with just one click into playback software like Roon, HQPlayer etc.