Just upgraded my speakers - do I still need the subs

Only you can answer your question.

Yes, keep the subs or get better ones. Subtraction is not going to equal better sound. I ran 4 much larger subs when I had my Ref 1s. Just make sure they are set up well.

I recently sold my KC62 sub because it was adding too much bass in my space. I went from LS50 Meta to Magnepan LRS+ to Magnepan Mini and all used the KC62. The KC62 was good with the first 2 in a bigger room. The Mini is in an open-ish space, different from the other 2, but the KC62 was too powerful in this new space. Though I think using my CODA #16 amp and the imersiv D-1 DAC with the Magnepan Mini was also too much bass. I replaced the CODA #16 with a Class D Audio GanFet 6.5 amp and the imersiv D-1 with a RME DAC and the bass is much lower. 

So, I think it depends on your room and amp. I would try the Ref 1 Meta without the sub and see if you find it lacking. Then sell it if it is not lacking. I always considered the LS50 Meta + KC62 similar power wise to the Ref 1 Meta. The Ref 1 Meta + 2  KC62 seems like a hypothetical Ref 2 Meta.

@fritzenheimer 

I suggest you keep the subs. Multiple subs not only supplement the low end, they reduce room modes and greatly smooth your response.

Below is a recording from my room using four subs, but the benefit is largely gained with just two.