Refatoramento class Student

Professor, analisei a classe, e fiz algumas alterações sobre tipo Primitivos, gostaria de saber se foi felizardo na refatoração

<?php

namespace Alura\Calisthenics\Domain\Student;

use Alura\Calisthenics\Domain\Email\Email;
use Alura\Calisthenics\Domain\Localization\Localization;
use Alura\Calisthenics\Domain\Name\Name;
use Alura\Calisthenics\Domain\Video\Video;
use DateTimeImmutable;
use DateTimeInterface;
use Ds\Map;

class Student
{

    private Email $email;
    private DateTimeInterface $bd;
    private Map $watchedVideos;
    private Name $name;
    private Localization $localization;
    public function __construct(
        Email $email,
        DateTimeInterface $bd,
        Name $name,
        Localization $localization
    ) {
        $this->watchedVideos = new Map();
        $this->email = $email;
        $this->bd = $bd;
        $this->name = $name;
        $this->localization = $localization;
    }


    public function getBd(): DateTimeInterface
    {
        return $this->bd;
    }

    public function watch(Video $video, DateTimeInterface $date)
    {
        $this->watchedVideos->put($video, $date);
    }

    public function hasAccess(): bool
    {
        if ($this->watchedVideos->count() === 0) {
            return true;
        }

        $this->orderVideoByDateWatch();

        $today = new DateTimeImmutable();
        $firstDate = $this->renderFirstVideoForWatching();

        return $firstDate->diff($today)->days < 90;
    }

    private function orderVideoByDateWatch(): void
    {
        $this->watchedVideos->sort(fn(DateTimeInterface $dateA, DateTimeInterface $dateB) => $dateA <=> $dateB);
    }

    private function renderFirstVideoForWatching(): DateTimeImmutable
    {
        /** @var DateTimeInterface $firstDate */
        return $this->watchedVideos->first()->value;
    }
}