Holding a defensive card for the right enemy attack is useful. Holding every leftover card is a larger commitment. The beta Well-Laid Plans gives you that second kind of control, including the awkward cards you would otherwise have discarded.
The question is not whether retention is strong. It is whether this particular hand will be useful next turn.
This is a different card from the main version
The v0.109 beta reworked Well-Laid Plans into a Rare Power that prevents your hand from being discarded at the end of the turn. The v0.110 notes then changed its cost to two Energy, or one upgraded.
Do not apply the old advice about selecting one or two cards to retain. The database entry includes main-branch reference material, whose art can show that older design. Read the version warning and the current client text together.
The beta effect concerns end-of-turn discard. It is not a promise that every card becomes immune to other rules or effects that move, remove, or Exhaust it.
Pay for setup without losing the fight
On an ordinary three-Energy turn, the unupgraded Power leaves one Energy for other cards. The upgrade leaves two. That difference can decide whether you can establish retention and still cover an attack.
Before playing it, compare the turn with a line that delays setup. If you already have an immediate kill or need the full budget for defense, paying for future hand control may be the wrong use of the turn.
A quiet enemy action is a more comfortable setup window, but check the next turn as well. Preserving a hand of expensive cards does not create the Energy needed to play them.
Keep something you can name
Good reasons to preserve a card are specific: a defensive answer for a known attack, a payoff waiting for its support, or damage reserved for a target that will matter later.
For Silent, Outbreak and Haze illustrate why timing and budget matter together. Being able to keep useful pieces can make a later line easier to assemble. It does not guarantee the other pieces will appear or that the full line is affordable.
Look at what the hand will contain after this turn, not just the one card you are pleased to keep.
Watch the leftovers
Whole-hand preservation also carries cards you may not want. Before ending the turn, inspect retained clutter and the space available for new cards under the current game's hand rules.
Do not assume unlimited room or invent a universal discard exception. If the hand is already crowded, additional draw may provide less useful access than expected. Play or otherwise deal with unnecessary cards only when doing so has a genuine benefit and an acceptable cost.
That is where deck quality matters. The Silent guide offers a broader framework for deciding which cards support the run and which merely accumulate.
Upgrade for the setup turn you actually face
Saving one Energy on a Power is valuable when it changes a recurring setup problem. If you can already play Well-Laid Plans safely, another upgrade may improve more turns.
After a fight, review both sides of the effect: which saved card prevented damage or enabled a kill, and which leftovers made a later hand awkward. That gives a better upgrade or drafting decision than treating all retained cards as equally useful.