149th St-Grand Concourse doesn't look that bad but yes needs improvement, the worst is Third Avenue–138th Street, Chambers St of the Bronx.
It needs full modernization and renovation.
https://about.bgov.com/news/manafort-linked-firm-helps-china-company-chase-nyc-subway-deal/
Why would China instead of Japan Kawasaki manufactures R262?
R62s is on the is mainly because of got R188s, many R142 converted to R188. might get R142s from the if CBTC on Lexington Avenue is Completed, then will get R62.