They've clamped down on anyone earning above £110,000 meaning from 8th July anyone earning above that amount won't be allowed to create a new salary sacrifice to reduce their salary. This was mainly in respect of the further restriction to the maximum amount that higher earners (or their employers) are now allowed to pay into pension, which now tapers down from £40,000 pa to £10,000 pa.
There's been no change in salary sacrifice for anyone else.
For the C2W scheme, in theory there's no problem in the Government upping the £1,000 limit as they'd just have to create a higher amount as being exempt from the need to have what was originally a consumer credit licence and would now be a particular regulated permission from the FCA. However, if they were going to do it, then last week's Budget would have been the time to announce it.