What upgrades are you interested in?
Apart from perhaps refreshing some room things I probably won't notice (linens - towels - fabrics etc.) - the biggest change best I can figure out is the rooms now have Nespresso coffee makers instead of a traditional French press coffee maker. I hope there's not a new - more advanced toilet. Couldn't figure out the last one

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IMO - there's only one downside to this hotel - and it applies only to some people. It is on the lower floors of a high rise building. Therefore no great city - possible Mt. Fuji - etc. views. OTOH - it's perfect for me and my husband (he doesn't like heights - and I'm scared of evacuating buildings during possible earthquakes). Robyn