That is possible.
On the other hand, lets say that Cardinal Kasper’s suggestion is taken where a valid marriage ends in divorce, one of the spouses remarries they go to reconciliation and can now receive communion. If I have understood the Cardinal’s position he would treat the single act of contracting a new marriage as a single sinful act and all subsequent actions as acceptable. Reconciliation would involve absolution of attempting to contract marriage while their first spouse was alive.
How does the good Cardinal’s proposal allow for a “tweak” while still upholding the doctrine of the indissolubility of marriage?
Here is the real problem. For every person that might leave if things are not changed, there are also those that will lose their faith if things do change. In providing tweaks for pastoral care you could lose tens of thousands who see church teachings as bedrock turning into shifting sand.
The other thing is that many that want things to change already ignore the church teachings on divorce and remarriage, contraception, homosexual unions, etc., but still receive the Eucharist anyway. So what does tweaking things do except maybe remove some of the guilt so they don’t feel so bad? On the other hand if you lose tens or even hundreds of thousands through a crisis of faith have you really improved the situation?