First the cricket.
Cricket in Sri Lanka has never been commercially viable. In India, it’s a big billion dollar business.
So if the cricket stops,
The traffic to India from SL’s negligible.
India contributes heavily to tourism in Sri Lanka.
Sri Lanka lose.
Sri Lanka is a very profitable trade partner for India.
Indians come to SL only for duty free liquor business or as expats. No big loss for Sri Lanka. Some will welcome this.
Culture & Religion
Both are the same. No one really will miss the other.