There was never any chance of a massive ground invasion last week or the week before. The amount of traps, hidden tunnels in front and in back, the amount of Hamas training for this battle vs. the Israeli amount of planning etc. would have made it impossible. Even when the news was saying again and again that it is imminent I knew it would not happen then.
For the ground war to start Israel needs (1) a weakened Hamas infrastructure from the bombings and weakened Hamas fighters from the siege (2) Hamas can not be on alert like they certainly were over the first two weeks (3)intelligence needs to be discovered (4) serious planning needs to be done. Even then they probably won’t do an all out invasion. They will probably try to locate specific targets to destroy that can’t be destroyed from the air and retreat right afterwards.