These categories have some nuance. For example, a delay might be reasonable if an executor is waiting to sell certain assets, since in some cases early sale may result in a lower price and reduce the amount distributed to beneficiaries. However, if the delay is occurring because an executor is simply not carrying out their duties and instead taking an extended holiday in Mallorca, then a judge could see grounds for a removal.
Conflict of interest claims can also be difficult to quantify. For example, if one or more of the beneficiaries chooses to contest the will, the executor may not be considered to be in conflict. After all, the executor has no say in how the property is distributed. Their job is simply to make the distributions based on the final ruling on which will is valid. Being a beneficiary and simultaneously an executor is also not a conflict of interest. However, if the executor is also trying to purchase a property from the estate at a lower market value, for example, they’d be in danger of having a conflict of interest.
For a misconduct claim, beneficiaries must usually be able to demonstrate flagrant abuse, such as stealing from the estate. Without evidence of misconduct, probate courts generally decline to switch executors.
In general, hostility between the executor and beneficiaries is not enough to justify the removal of an executor, nor are technical errors made in good faith. However, an executor that regularly favors one beneficiary over another or provides more access to one party might be removed.