The phrase 'have eventually decided' is correct and usable in written English.
You can use it when you want to indicate that a decision was made after much deliberation and thought. Example sentence: After long hours of discussions among the team members, they have eventually decided to launch the new product in November.
There are lots of intractable guerrilla forces that have eventually decided to stop shooting and pursue their aims through politics.
"Given the heavy and on-going economic and financial crisis in Greece, we have eventually decided to exit the Greek market," said Gerhard Zeiler, chief executive of RTL Group.
California has long been more adventurous than even the federal government in pushing for cleaner cars, and over time this has benefited the nation as a whole because automakers have eventually decided to sell the cars they make for California in other markets.
We have eventually decided to publish this "as is".
She had eventually decided to load the machine with sheets of paper instead of dough.
He'd got so good at defusing car bombs that his opponents had eventually decided he needed defusing himself.
Ms. Schapiro said that she had seriously considered numerous proposals since the financial crisis, but had eventually decided it was time to act.
"But I couldn't do it in this factory". She had eventually decided to load the machine with sheets of paper instead of dough.
She said she had eventually decided to launch a formal challenge because Mr Corbyn was unwilling to stand down and she could provide the real leadership he could not.
She said she had eventually decided to launch a formal challenge because he was unwilling to stand down and she could provide the real leadership he could not.
Having eventually decided on the basic outline of the plot for the film, the writers then separated it into seven sections.
