You have nothing to regret. Eulogies are kind of a modern thing. It's one thing to have fond memories of someone, or to share them with others during a conversation at the wake or whatever, but a public speech that sums up a person is something like passing judgement on a person, and I would dread putting myself in that position as no one really has the authority to do that. (That's why Catholics do not traditionally eulogize at a funeral mass or a wake, as passing judgement on a person, as opposed to, say, judging certain facets of their actions, is something reserved for God alone, as only God could know the heart of a person. A proper Catholic funeral mass is, in fact, entirely focused on making a sacrificial offering for the soul of the departed; there is no presumption made about the fate of the deceased.)