Oncidium Sweet Sugar "Million Dollar" in spike again

[NYCorchidman]

This plant blooms every 6 month or so. like a clock.
For some reason, each new growth is getting smaller and smaller. still bear good enough amount of flowers to enjoy, although nothing like its first bloom which had 100 flowers on a very thick spike.

You can find two spikes toward both ends of the picture.

I wonder if dividing into smaller clump will bring a larger pbs with more flower conut again.
anyone has any ideas???