Actually, you have always needed to specify that you need a roll in shower.
We've been using Disney Vacation Club villas for a long time and have always needed to specify since there are partially accessible villas with raised seat toilets and grab bars in the bathrooms.
Unless you specify, they will not know what you want.
All DVC one bedroom, 2 bedroom and Grand villa have both a shower and whirlpool tub in the master bath - the shower will not be roll in unless that is what was specified. Studios (and second bedrooms of 2 bedroom units) have a tub/shower combination, which will have grab bars in the villas without roll in showers.
It's a good reminder to mke sure you get what you expect.