To date there's:
- Reports that he had Tesla engineers with him when they interviewed some Twitter engineeers. Currently the biggest arguments against that are: Tesla engineers belong to Tesla (we have no idea in what capacity they were they) and "that's an ineffective strategy to review a codebase" (we have no idea if that's what they were actually doing.
- Reports that he gave a team until Nov 7th to roll out a paid subscription
- Reports that he may lay people off (unverified)
- Carried in a sink.
None of these things are particularly unreasonable - Twitter owes something like 1 billion in debt payments this year and brings in close to $500 million, so layoffs were probably coming regardless.
I don't really see what the big deal with Musk buying Twitter is, except as cover for being mad about him unbanning people.