The bits which arnt safe are the divots and crators and general uneveness at the CBS.
They should be taking advice of pitch experts like cricket stadium groundsman at say edgbaston.
Who repair bowlers footmarks after a 5 day test which literally has craters in it from fast bowlers size 12 spikes into also a rock hard square. Think they use a mixture of conrete and mud for repairs.
Cricket squares are repaired within a week before next home game. On a surface ie a square which is generally better quality than a football pitch .
The longer this goes on the worse it looks on Wasps. They were happy to try and shift the blame with the 'get someone independent in' but now that's happened and they've said the pitch is shit they've gone very quiet. We're also past the 'play a few games away' point now as well. There is zero excuse for the pitch to not be playable now.