"Generally, cards that have bloodlust are always slow and this is probably because if they had decent or good speed, they might be indestructible."

This is not true, look f.e. the KRASH WANDERFORD, he start with Speed 6 at Level 1 and has Speed 8 at Max-Level, what other monster has Speed 8 (or more).

Also AJAX LIGHTFOOT has Speed 7 at max-level.