Though same with your argument, they don't have that much scorers compared with SMB and Ginebra but with pride for being the last season champ, I think it will help them to try harder.
As long as they maintain a healthy import, TNT will stay competitive. However, it's undeniable that their championship odds are diminished due to the absence of two key players. While Castro is undoubtedly skilled, we can't rely on him to carry the team consistently. Additionally, RHJ hasn't fully proven himself this conference, and personally, I'm not satisfied with his production in his debut.
That's the most important thing they have to maintain, although they can get a replacement import if that will happen but RHJ is a different breed, I mean he already proven himself many times not only in the PBA but also during the FIBA WC and Asian Cup where his team play against Gilas Pilipinas. As of now, it's too early to conclude who the best import is, and I'm sure RJH will try to catch up with the statistics to have a good chance in winning the best import award.