It’s seldom a good idea to downgrade – you say yourself in some place that downgrading is not possible. Staying with an outdated plugin is not safe and as plugins within WordPress are usually updated automatically, it’s also not so easy to keep plugins from updating.
Kamal, the plugin is great work, but “never change a winning team” and people like to stick with good things as they are if possible. So it’s always better to keep things principally like they are, while at the same time optionally offer newly added things. If these newly added options (like additional design options or automatic placements) are convincing, people will choose them voluntarily!