Have Maximillian become Emperor and not Franz Joseph.
You might see a completely different, more liberal AH, with France as an ally.
Which means that the reunification of Germany either does not happen at all, or if it does, then under Hapsburg rule.
This would make a WWI very unlikely.
If there is no Germany there is no conflict with GB and Russia.
If there is a Germany it would not have a fleet to bother GB - AH had no colonies and was never interested in any. A big fleet would be a waste of money and recources.
There might be trouble with Russia over the Balkan, but with France as an ally and GB neutral, AH/Germany would be no match.
Do away with Franz Joseph and AH has a chance to make it further than 1918.